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270AR load data only

62K views 168 replies 28 participants last post by  Ed308 
#1 · (Edited)
Moved this from the other thread.
Making 270AR brass from 6.5x47-


The Olympic Arms UMAR lower receiver will allow loading this to 2.4" making it a perfect fit for the 270AR. It really allows loading the bullets out near the lands to gain accuracy.

NOTICE---These are near max loads for the reason above. Be careful when using formed 308 brass start with a load at least 3 gr lower and workup. Accuracy will most likely be found 1/2gr -1gr below the max loads.

EDITED 12/14/14-
Quick testing in the shop today 59degrees-
Lapua brass, CCI450 primers, 20" production barrel, All bullets loaded to 2.300

120SST
37gr H335=2939fps@58kpsi
38gr CFE=2794@50Kpsi- max case fill

130 Berger #27501
36gr H335=2787@57kpsi
38grCFE=2723@51kpsi-max case fill
34gr N530=2820fps@58kpsi
35gr 8208=2750fps@55kpsi

Any loads approaching 57-58k should be considered maximum usable load.

************************************************** ******************************************
2013 data-
85 and 90gr bullets---RE7 36gr produced 3290fps

7/31/13- all loaded to OAL 2.29" 45gr gross case capacity(Creedmoor brass), 18" barrel.
36gr 8208- Hornady 120gr SST produced 2820fps.
37gr IMR 8208- 100gr nosler accubond=2994fps
36gr Alliant 1200R - 105 GS SP solid copper=2996fps
37gr Alliant Re7- 85gr TSX=3450fps

10/18/13-Using Creedmoor brass CCI BR4 primers, 20" barrel. The lands in this chamber are a little closer (.025) than the 6.8s so the same COAL can be used. IMO there is plenty of velocity here with the 130gr bullets.
130gr Berger-36gr 8208=2796fps
120gr SSt-37gr 8208=2887
110gr HPBT-38gr 8208=2998-

12/8/13-20" barrel
110gr Hornady HPBT-near max loads
35gr 10X=2992--10X started cratering primers before N530 or 8208 IMO 10x should be used on bullets 85-110gr
35gr N530=3002
35gr H4895=2748

85gr TSX-near max loads
38gr AA2200=3375
38gr 1200R=3448

99gr GS Custom HV
37gr 1200R=3180

12/15/13
Using Hornady Creedmoor brass. DO NOT USE THESE LOADS IN ANY OTHER BRAND BRASS CASES!!

34gr of 1200R behind the 130 is max IMO...2789fps.

37gr H335, 130 berger=2850
37.5gr H335, 130 berger=2889--close to max, no cratering, primer starting to flatten out a little.

38gr H335, 120gr SST=2977
35gr 1200R, 120 SST=2952
38gr H335, 110gr HPBT=3045
35gr 1200R,110gr HPBT=3023
 
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#2 ·
Here is what I have so far.

Please use the following post format. Fill in what you can when you post, then fill in the rest later when possible.

Intended use: Training\practice, , plinking, hunting, tactical, etc.
Notes\Comments:
Case manufacturer and prep work done: anneal? neck ream? neck turn?

Case length:
Bullet manufacturer:
Bullet weight and type:
Powder:
Powder charge weight:
OAL:
Primer:

Chrono data:
Avg Fps
ES
SD
Accuracy @ 100yds


Here is the data H had posted:

Pretty easy to see which powders will work best with each weight bullet after today.
85s and 90s- Re7, 2200, 1200R--------3300+ from 20" barrel
100-10X, 2230, H322, 748, BLC2------3050-3100
110-10X, 8208, N530,H335------------2950-3000
120-8208, N530-------------------------2850-2900
130-8208,N530--------------------------2750-2800

NOTICE---These are near max loads for the reason above. Be careful when using formed 308 brass start with a load at least 3 gr lower and workup.
- 18" barrel--I think the burn rate of CFE, Varget, RE15 and AR Comp is a little slow for optimum velocities.
37gr CFE223, not max pressure. 110gr HPBT=2855fps chrono did not read above 37gr. 40gr was not max pressure.
37gr CFE223, not max pressure. 120gr SST=2736
39gr CFE223, Max pressure 120gr SST=2860 primer starting to flatten, no cratering.
38gr CFE223, 130gr Berger=2692fps-no signs of pressure.

10/18/13-Using Creedmoor brass CCI BR4 primers, 20" barrel. The lands in this chamber are a little closer (.025) than the 6.8s so the same COAL can be used. IMO there is plenty of velocity here with the 130gr bullets.
130gr Berger-36gr 8208=2796fps
120gr SSt-37gr 8208=2887
110gr HPBT-38gr 8208=2998-

Powders usable- always start lower and work up the loads shown are near max with 130gr Bergers.
CFE 223 is on the slow side with 130gr bullets.
8208--36gr pushed 130 Berger to 2796fps
N530--35gr 2801fps
H4895
AA2230

85 and 90gr bullets---RE7 36gr produced 3290fps

7/31/13- all loaded to OAL 2.29" 45gr gross case capacity(Creedmoor brass), 18" barrel.
36gr 8208- Hornady 120gr SST produced 2820fps.
37gr IMR 8208- 100gr nosler accubond=2994fps
36gr Alliant 1200R - 105 GS SP solid copper=2996fps
37gr Alliant Re7- 85gr TSX=3450fps

12/8/13-20" barrel
110gr Hornady HPBT-near max loads
35gr 10X=2992
35gr N530=3002
35gr H4895=2748

85gr TSX-near max loads
38gr AA2200=3375
38gr 1200R=3448

99GS bullet
37gr 1200R=3180

12/15/2013
Using Hornady Creedmoor brass
34gr of 1200R behind the 130 is max IMO...2789fps.
37gr H335, 130 berger=2850
37.5gr H335, 130 berger=2889--close to max, no cratering, primer starting to flatten out a little.
38gr H335, 120gr SST=2977
35gr 1200R, 120 SST=2952
38gr H335, 110gr HPBT=3045
35gr 1200R,110gr HPBT=3023

 
#3 ·
here is the chrono data:

all bergers are loaded 2.36 oal
the 130 pulls are loaded to 2.27 which is mid cannalure
primers are tula 7.62 nato large rifle

Code:
[TABLE="width: 283"]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]8208[/TD]
[TD]berger 130[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Series[/TD]
[TD]charge[/TD]
[TD]Speed[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]32.8[/TD]
[TD="align: right"]2554[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]33.3[/TD]
[TD="align: right"]2617[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]33.8[/TD]
[TD="align: right"]2642[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]33.8[/TD]
[TD="align: right"]2641[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]34.3[/TD]
[TD="align: right"]2679[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]34.3[/TD]
[TD="align: right"]2680[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]34.8[/TD]
[TD="align: right"]2729[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]34.8[/TD]
[TD="align: right"]2730[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]35.1[/TD]
[TD="align: right"]2736[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]35.1[/TD]
[TD="align: right"]2742[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]35.4[/TD]
[TD="align: right"]2748[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]35.4[/TD]
[TD="align: right"]2777[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD][/TD]
[TD="align: right"]35.7[/TD]
[TD="align: right"]2793[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[/TR]
[TR]
[TD]imr4895[/TD]
[TD]berger 130[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD]charge[/TD]
[TD]Speed[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]33.5[/TD]
[TD="align: right"]2569[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]34[/TD]
[TD="align: right"]2624[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]34.5[/TD]
[TD="align: right"]2615[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]35[/TD]
[TD="align: right"]2642[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]35.5[/TD]
[TD="align: right"]2724[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]36[/TD]
[TD="align: right"]2732[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[/TR]
[TR]
[TD]TAC[/TD]
[TD]berger 130[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Series[/TD]
[TD]charge[/TD]
[TD]Speed[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]33.4[/TD]
[TD="align: right"]2492[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]33.9[/TD]
[TD="align: right"]2582[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]34.4[/TD]
[TD="align: right"]2608[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]34.9[/TD]
[TD="align: right"]2630[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]35.4[/TD]
[TD="align: right"]2669[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]35.7[/TD]
[TD="align: right"]2693[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]36[/TD]
[TD="align: right"]2724[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]36.3[/TD]
[TD="align: right"]2718[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]36.6[/TD]
[TD="align: right"]2750[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]36.9[/TD]
[TD="align: right"]2794[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[/TR]
[TR]
[TD]AA2520[/TD]
[TD]berger 130[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Series[/TD]
[TD]charge[/TD]
[TD]Speed[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]34.1[/TD]
[TD="align: right"]2574[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]34.6[/TD]
[TD="align: right"]2619[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]35.1[/TD]
[TD="align: right"]2649[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]35.6[/TD]
[TD="align: right"]2708[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]36.1[/TD]
[TD="align: right"]2727[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]36.6[/TD]
[TD="align: right"]2753[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]36.9[/TD]
[TD="align: right"]2797[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]37.2[/TD]
[TD="align: right"]2794[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[/TR]
[TR]
[TD]AA2520[/TD]
[TD]130 PULLS[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Series[/TD]
[TD]charge[/TD]
[TD]Speed[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]34[/TD]
[TD="align: right"]2586[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]34.5[/TD]
[TD="align: right"]2641[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]35[/TD]
[TD="align: right"]2659[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]35.5[/TD]
[TD="align: right"]2695[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]36[/TD]
[TD="align: right"]2732[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]36.3[/TD]
[TD="align: right"]2757[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]36.6[/TD]
[TD="align: right"]2738[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]36.9[/TD]
[TD="align: right"]2780[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[/TR]
[TR]
[TD="align: right"]748[/TD]
[TD]130 PULLS[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Series[/TD]
[TD]charge[/TD]
[TD]Speed[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]34[/TD]
[TD="align: right"]2455[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]34.5[/TD]
[TD="align: right"]2486[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]35[/TD]
[TD="align: right"]2517[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]35.5[/TD]
[TD="align: right"]2592[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]35.8[/TD]
[TD="align: right"]2570[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]36.1[/TD]
[TD="align: right"]2601[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]36.4[/TD]
[TD="align: right"]2606[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]36.7[/TD]
[TD="align: right"]2660[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]37[/TD]
[TD="align: right"]2678[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]37.3[/TD]
[TD="align: right"]2707[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]37.6[/TD]
[TD="align: right"]2721[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]37.9[/TD]
[TD="align: right"]2707[/TD]
[TD]ft/sec[/TD]
[/TR]
[TR]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[TD]----[/TD]
[/TR]
[/TABLE]
pictures of the primers lowest charge is always bottom left then i work up each row to the right.

i think it maybe unlocking early because of over gassing. next time out i won't forget my allen wrench for the adjustable gas block.







 
#4 · (Edited)
3-9-14 overcast 38 deg 8-15 mph south wind

creedmoor brass uses tula 7.62 nato large rifle primers

lapua cases use remington 7.5 small rifle primers

all cases trimmed to 1.648

update on fire formed case capacity

lapua 6.5x47 brass fresh 42.8gn fire formed 43.68 gn

creedmoor brass fresh 43.5 gn fire formed 44.7 gn

Creedmoor case prep:
form with redding bushing die no bushing

expand with nat27 mandrel

trim to 1.648

size with whidden non bushing die no guts

expand with nat27 expander

no neck turning

Lapua brass case prep:

form with redding bushing die no bushing

expand with nat27 mandrel

trim to 1.648

size with 303 bushing or whatever bushing gets you to .273-.2735 id at case mouth

neck ream with .2735 reamer

expand with nat27 expander

neck turn to .0125 - .0135 neck thickness

resize with the whidden non bushing die with expander

after fire form i run a standard 277 reamer through them just to make sure the ring is gone and i anneal them.

8208 130 pulls creedmoor 2.27 oal
charge Speed
35.1 2744 ft/sec
35.4 2790 ft/sec
35.7 2804 ft/sec
36 2820 ft/sec
---- ---- ---- ----

8208 120 sst creedmoor 2.295 oal
charge Speed
36.4 2888 ft/sec
36.7 2927 ft/sec
37 2939 ft/sec
37.3 2951 ft/sec
---- ---- ---- ----
8208 110 Vmax creedmoor 2.295 oal
charge Speed
36.7 2972 ft/sec
37 3013 ft/sec
37.3 3043 ft/sec
37.6 3067 ft/sec
---- ---- ---- ----
1200R 120SST creedmoor 2.295 oal
charge Speed
34.4 2871 ft/sec
34.7 2875 ft/sec
35 2920 ft/sec
35.3 2969 ft/sec
---- ---- ---- ----
1200R 110 Vmax creedmoor 2.295 oal
charge Speed
34.7 2999 ft/sec
35 3001 ft/sec
35.3 3026 ft/sec
35.6 3001 ft/sec
---- ---- ---- ----
1200R 85 mpg creedmoor 2.24 oal
charge Speed
37.2 3289 ft/sec
37.5 3317 ft/sec
37.8 3340 ft/sec
38.1 3360 ft/sec
---- ---- ---- ----

LT32 85 MPG lapua 6.5x47 2.24 oal
INSIDE NECK REAM AND TURN
charge Speed
35.4 3240 ft/sec
35.7 3246 ft/sec
no cycling need more powder
---- ---- ---- ----
LT32 110 Vmax lapua 6.5x47 2.295 oal
INSIDE NECK REAM AND TURN
charge Speed
33 2862 ft/sec
33.3 2873 ft/sec
Barely cycle at top needs more powder 1-2gn
---- ---- ---- ----
1200R 120SST lapua 6.5x47 2.295 oal
INSIDE NECK REAM AND TURN
charge Speed
34.4 2896 ft/sec
34.7 2923 ft/sec
35 2932 ft/sec
---- ---- ---- ----
TAC 120SST lapua 6.5x47 2.295 oal
INSIDE NECK REAM AND TURN
charge Speed
37 2870 ft/sec
37.3 2885 ft/sec
37.6 2917 ft/sec
Not maxed will retest 37 - 39 gn
---- ---- ---- ----
TAC 130SST lapua 6.5x47 2.35 oal
INSIDE NECK REAM AND TURN
CHARGE Speed
36.5 2782 ft/sec
36.8 2797 ft/sec
Not maxed will retest 36.5 - 38 gn
---- ---- ---- ----
CFE 120SST lapua 6.5x47 2.295 oal
INSIDE NECK REAM AND TURN
CHARGE Speed
38.4 2770 ft/sec
39 2826 ft/sec
39.3 2810 ft/sec
Not maxed going to retest 38.4 up to 40 gn if it will fit.
---- ---- ---- ----

8208 130 PULLS FIRE FORM CREEDMOOR 2.27 oal
INSIDE NECK REAM
CHARGE Speed
36 2807 ft/sec
36.3 2824 ft/sec
36.6 2812 ft/sec
---- ---- ---- ----
CFE 130SST lapua 6.5x47 2.235 oal
INSIDE NECK REAM AND TURN
CHARGE Speed
38.3 2710 ft/sec
38.6 2747 ft/sec
Not maxed going to retest 38.3 - 39.8 if it will fit
---- ---- ---- ----
2200 85 MPG lapua 6.5x47 2.24 oal
INSIDE NECK REAM AND TURN
CHARGE Speed
36.7 3357 ft/sec
37 3373 ft/sec
37.3 3373 ft/sec
37.6 3403 ft/sec
---- ---- ---- ----
H335 110 VMAX lapua 6.5x47 2.295 oal
INSIDE NECK REAM AND TURN
CHARGE Speed
37.2 2985 ft/sec
37.5 3017 ft/sec
37.8 3032 ft/sec
38 3058 ft/sec
 
This post has been deleted
#7 · (Edited)
Try these loads at your own risk, each brass processing and brass can be different. Start low and work up.
I was overgassed and the darn allen wrench didn't want to turn the gas block screw, so will be retesting some.
PRI Gen 1 magazine feed perfectly.
I wasn't really checking groups, will test again without the Magnetospeed attached to the barrel and once-fired cases with the shoulder bumped appropriately.

For these loads:

Lapua 6.5x47 processed brass
Necks reamed and turned to .013"
WSR primers

130gr Nosler Ballistic Tip
IMR 8208
OAL = 2.295"


34.5 gr
2727
2729
2748
Ave = 2734 fps

34.8 gr
2756
2757
2745
Ave = 2752 fps

35.1 gr
2765
2777
2783
Ave = 2775 fps

35.4 gr
2788
2796
x (didn't register)
Ave = 2792 fps

35.7 gr
2810
2785
2812
Ave = 2802 fps

36.0 gr
2816
2839
2828
Ave = 2828 fps

The 8208 is really compressed on new cases, might not be so bad after once fired, will try later, but seems too slow for the 130's

Barnes 95gr TTSX
H322 Powder
OAL = 2.295"


34.0 gr (only 2 shot strings to check pressures)
3019
3019

34.5 gr
3046
3061

35.0 gr
3105
3094

35.5 gr
3134
3125

36.0 gr
3140
3182

36.5 gr (Max out of my gun, pierced primers, will test again after adjusting gas)
3211
3236

37.0 gr
3255
3263

120gr SST's
H335
OAL = 2.295"

37.5 gr (This is already max pressure in my gun)
2974
2995

38.0 gr (Too much)
3022
3021
 
#8 · (Edited)
5-09-14
Clear 85 degrees, wind 5-10mph @ 7oclock.
100 yd range
Chrono - Oehler 35P.

270AR
6.5x47 Lapua brass - necks turned .013", reamed .2735", trim to 1.648".
110 HPBT Hornady
CCI 450
2.295" oal.

As always - Works up your loads.
The following all show rounded primers, and minimal to no swipes on the brass - with my Barrel/Bolt.

1200R
H335
N530
33.5 grn
Avg.fps
36.5 grn
Avg.fps
34.4 grn
Avg.fps
2871
2911
2915
2874
2916
2925
2866
2870
2931
2919
2926
2922
34.0 grn
37.0 grn
34.7 grn
2928
2975
2990
2934
2949
2972
2925
2899
2946
2956
2976
2979
34.5 grn
37.3 grn
35.0 grn
2979
3017
2993
2955
2966
2988
2978
2970
2969
2984
3001
2994
34.8 grn
37.6 grn
35.2 grn
3017
3016
2976
2997
3007
3021
3012
3008
3009
3010
3007
3001
35.0 grn
37.8 grn
35.4 grn
3011
3028
3027
3008
2996
3039
3008
3009
2999
3007
3029
3031

Dennis
 
#12 ·
Finally found thee load. I've had lots of good loads, but this is my baby for shooting targets or where I might lose brass in the grass. I used winchester 308 brass, neck turned and prepped as normal. 34 gr imr8208, 130 gr nosler ballistic tip, oal 2.290". I didn't set up my chronograph, but they are plenty warm. It leaves one slightly out of round hole in the target at 75 yards, shooting prone over my shooting bag. I was basically just checking for pressure, so the groups really surprised me. The 3 shot groups were under 1/4", so figure maybe .3-.4 moa. Today was more about letting the kids blow through some 22 shells, but I had a couple loaded up to check real quick. 34.5 gr shot nearly as well, but they were too warm for my likings. I have about .005" shoulder bump. I'll edit this post once I run them over a chrono.
 
#13 ·
I was pretty much running the same load. 34grs of 8208 in 308 win brass with 130gr Nos BTs. I was running about 2850fps. The brass is trash! 33grs of N530 with the same bullet and brass will get you about 2850fps. Brass is trash! I'm gonna see how Lapua holds up. Gonna use the same load with a 110gr AB and work up if I can.
 
#15 · (Edited)
120SST / CFE223
COAL - 2.265"
Trim to: 1.646"
Lapua 6.5x47 brass
Neck thickness: .0145" *
Remington 7 & 1/2 primer
Powder Charge: 39.9 or 40.0
Ten Shot Accuracy: 1" @ 100 Yards.
Velocity: 2900 ft./sec @ 94°. Slower with cooler temps.




120SST / 1200R
COAL - 2.265"
Trim to: 1.646"
Lapua 6.5x47 brass
Neck thickness: .0145" *
Remington 7 & 1/2 primer
Powder Charge: 34.0
Ten Shot Accuracy: 1" @ 100 Yards.
Velocity: 2850 ft./sec @ 94°. Not sure of any temp sensitivity?

Both of these loads shoot very similar point of impact for my rifle.

* Neck thickness is not uniform for the entire length of the necks of this brass. I am only taking off the minimum to get these to chamber. The case neck at the mouth is thinner than near the shoulder.



edit: I wanted to update with the fact that my data is based on previously fired brass and I resize using two different dies. I have the Whidden custom (original) full length sizing die and I have my original RCBS neck bushing bushing f/l sizing die.

I don't remember exactly how I arrived at my current procedure but I use the Whidden die first to set the headspace with the use of the expander ball. I then follow up using the RCBS die as a makeshift small body die. My Whidden die does not seem to size the case body enough and I think my RCBS die doesn't prevent my turned necks from becoming thicker.

This procedure is probably not necessary for everyone but it does work for me.
 
#16 · (Edited)
All loads I post will use Lapua brass, CCI 450 primers and will be 2.285" long.
I have not chrono'ed any of these but I will... when it stops raining, I'm 75 miles north of Seattle so maybe June or July.
Most of these are 2 or 3 shot ladders in .5 gr. steps watching for pressure signs and noting accuracy. 100 yds. bench with sand bags front and rear
110 gr. TTSX
Benchmark
36.5 - 38 grs. 37.5 primer getting flat 1/2" group
38 grs. HOLY **** pronounced ejector marks, primers way flat, primer pockets not holding new primers...
XBR 8208
37 - 38.5 grs primers edges still round all 4 groups 1/2"-5/8" nice load, need to chrono, powder is a bit compressed.

130 gr. Nosler Part.
Varget 36 -38 grs. Very mild, groups started about 1/2" to one ragged hole at 37grs. then opened up to 1-1/4 & 1-3/4" Don't think I can get to next node.

XBR 8208 36 grs. Stout load, primers a little flat, 5 shot group 1" tall 1/2" wide, will go up .2 grs each step from here but if group gets bigger I'll be happy with this as is.

130 gr. Berger Classic Hunter G1 BC .497
XBR 8208 34 grs. 5 rds 1" primers still round
35 grs. 3 rds. 3/4" primers still look good
35.5 grs. 3 rds. one triangle shaped hole, primers a little flat, stout load need to chrono but I think it's a keeper.

That's all for now

Bud

UPDATE: 110 gr. ttsx / XBR- 38 gr 2944-2972 FPS

130 gr berger / XBR- 35.5 gr 2735-2750 FPS

130 gr nos. part. / XBR- 36 gr 2748-2757 FPS
 
#17 · (Edited)
I finally got a chronograph so I will try to contribute. Please keep in mind that I am a novice reloader so please take my pressure observations with a grain of salt. One thing to note is the point of impact of the cfe was about 4 in lower than 8208 and h335. I got good accuracy(3 round groups) from all the h335 and 8208 and not from cfe. I will try it again and report back.


130SST / 8208
COAL - 2.95
creedmore brass (fire formed)
Winchester large rifle primers
Charge. Avg speed
35.5. 2874
36. 2888. (Flattened primers)
36.5. 2910 (too hot. Cratered primers)
37. 2927. (Too hot. Cratered primers)




130SST / h335
COAL - 2.95
creedmore brass (fire formed)
Winchester large rifle primers
charge. Avg speed
35.5. 2804
36. 2816
36.5 2849 (flattened primers)




130SST / cfe223
COAL - 2.95
creedmore brass (fire formed)
Winchester large rifle primers
charge. Avg speed
37.5. 2735
38. ? Phone messed up
38.5. ?phone messed up
39. 2897 (I will work up in smaller increments)
 
#18 ·
I have a velocity update with the 120 SST and CFE223. I shot five rounds across my chronograph in 35° temperatures this morning. Low velocity was 2777 ft./s and High was 2840 ft./s with an average of 2795 ft./s.


I guess the velocity hasn't changed too much from when it was 50 to 60° temperatures?


I just banged the shots out as quick as I could without even trying too hard. Point of impact had not changed and the group total was still right at 1 inch.


I reported earlier this summer that I got 2950 ft./s during some testing using a slightly higher powder charge. I actually saw that on two different occasions but I know the temps were above 95° so I don't think that number is realistic and should be discounted.


For this load upper 2800 - 2900 ft./s is probably realistic for hot summertime conditions and in colder weather upper 2700 - 2800 ft./s with this load.


And at the slower speeds in cooler temperatures this bullet does behave more like a big game bullet and less like an explosive varmint bullet on deer which is probably not a bad thing anyway.


40.0 CFE223
2.265" OAL
120 SST
Lapua x47
Rem 7.5 primer
.0145" neck


This load seem so stable to me I should probably set up my powder measure to speed up loading it. As it stands now I've gotten very lax on how much precision goes into powder trickling anyway.


I've got 250 pieces loaded up and ready for action.
 
#19 ·
I don't remember five posted this already on this site and I need to shoot it one more time to verify the load using the 110 Barnes TSX bullet. It has checked out twice so far and I expected to be good to go.


I think I have found the ideal seating depth for my gun of 2.275 inches over 40.5 grains of CFE223.


Back when I did this testing the temp was somewhere between 50 and 65° and I got a velocity of 2900 ft./s. I'm sure it will be a little less than that in 35° temperatures.

Barnes 110TSX
40.5 grains CFE223
Lapua x47 case
Rem 7.5 primer
2.275" OAL
.0145" neck
2900 ft./s
 
#20 ·
I was able to get out on Saturday and chrono some more loads. I only shot 2 per charge, in hindsight I should have shot more to get a better avg. The speed numbers were down a little even with more powder in some cases. I can think of two possible causes. The first is the temperature difference around 75 for the first set of numbers and anywhere from 50 (mid morning) to 65 for Sat. I also realized that when I reloaded the previous outings rounds that I didn't calibrate my scale. I have a cheap hornady scale and i am not sure how accurate it is. The newest set was calibrated. One interesting note; my buddy was shooting .270 Win Monarch 130 gr softpoints @ 2850 FPS so the 270 AR with SST's was outrunning them by a little.

Old outing approx 75 degrees
130SST / 8208
COAL - 2.95
creedmore brass (fire formed)
Winchester large rifle primers
Charge. Avg speed
35.5. 2874
36. 2888. (Flattened primers)
36.5. 2910 (too hot. Cratered primers)
37. 2927. (Too hot. Cratered primers)
NEW
130SST / 8208
Temp 55
COAL - 2.95
creedmore brass (fire formed)
Winchester large rifle primers
2 shot average
Charge. Avg speed
36.7 2895
36. 8 2897
36.9 2915 (mild swipes) (this is going to be my deer round, starting tomorrow)
37 2904 (mild swipes)
I know I origially said that 36.5 was too hot but I went back and looked at the brass and decided that the primers were just a little flat. With the colder weather (or accurate scale) these seem to be fine. All of these were accurate with the entire 8 shot group covering about 1.5 in

Old Temp approx 75
130SST / h335
COAL - 2.95
creedmore brass (fire formed)
Winchester large rifle primers
charge. Avg speed
35.5. 2804
36. 2816
36.5 2849 (flattened primers)
I didn't re shoot the H335 the pressure was too high and I wasn't getting the velocity of 8208

Old, Temp approx 75
130SST / cfe223
COAL - 2.95
creedmore brass (fire formed)
Winchester large rifle primers
charge. Avg speed
37.5. 2735
38. ? Phone messed up
38.5. ?phone messed up
39. 2897 (I will work up in smaller increments)
New
Temp 57
130SST / cfe223
COAL - 2.95
creedmore brass (fire formed)
Winchester large rifle primers
2 shot average
charge. Avg speed
39.1 2787
39.2 2801
39.3 2805
39.4 2831
39.5 2821
I have no idea why the velocity is down from last time. Again, I am blaiming the lack of calibration of the scale. I might revisit this after deer season. The cases still look good but the case is getting close to it's capacity. One thing to note is the point of impact between the 1st and 2nd shot was different. I hit the bulls-eye on every second shot but the first was consistently one inch lower.

I also did some playing around with Barnes 85 tsx. I was surprised to see my impact was virtually the same at 100 yards between the TSX and the SST. Please note that they are not all loaded to the same length.

Temp 61
85 TSX / AA2200
COAL Varied
creedmore brass (fire formed)
Winchester large rifle primers
2 shot average
Charge, COAL, Avg speed
37.5 2.25 3345
37.7 2.26 3355
37.9 2.295 3327
38.1 2.295 3350
 
#21 ·
Here are the results from this weekend. The 150 vld' shot much better than I expected.

Bullet: 85 TSX (this wouldn't cycle my gun)
Powder: AA2200
Temp: 60
Brass: New Creedmoor
Coal: 2.28
37.8. 3457
38.1. 3464 (hot)
38.4. 3427 (hot)

Bullet: 100 Accubond
Powder: H335
Temp: 66
Coal: 2.295
Brass: New Creedmoor
35.5. 2949
36. 3039
36.5. 3045
37. 3093

Bullet: 120 SST
Powder: 8208
Temp: 66
Coal: 2.295
Brass: New Creedmoor
36. 3010
36.5. 3045
37. 3097

Bullet: 150 VLD
Powder: Lever
Temp: 66
Coal: 2.349 (windowed mag)
Brass: New Creedmoor
33.5. 2442
34. 2553
34.5. 2566
35. 2590
35.5. 2639
36. 2653
36.5. 2679 (kind of hot)
37. 2773 (hot)
 
#22 · (Edited)
I know this load looks high but I used an Oehler 35P at the range and checked it multiple times, I fired about 20 rounds. Tested for velocity only, no accuracy yet.

LC 308 brass shortened, reamed and turned.
Berger 130 Classic Hunter
Fed 215 primer
N530 34.7 grains
Consistent FPS of right about 2950
Primers a bit flat with slight cratering. Have not tried to seat a new primer in them yet.

All rounds fed easily from G1 PRI 15 rnd 6.8 mag loaded 7 at a time and no FTE or FTF. I expected about 2800 FPS, chrono is brand new and very easy to use. Other loads showed about what I expected in 6.8 and 308.
 
#25 ·
I was surprised for sure, still need to check for accuracy. No doubt I will chrono it again along with the 120 SST and 100 AB. I keep looking for more N530 as well, fortunately I got about 5 pounds left. I too wondered if it had something to do with less case capacity. Hoping that is true as I have 1000 cases I am making up and its a lot of work and time.
 
#27 ·
Great performance. I was getting 2915 out of 8208 but have since backed the load down a bit as the primer pockets where done after about 3 to 4 firings on the creedmoor brass. I have done very little development with my .308 Win brass. Might have to change that.
 
#28 · (Edited)
270AR - Kreiger 26"

Range day for the 26" Krieger - 270AR..
Caught a day between rain/wind to hit the range and test out the 257 Bobcat, and my newest 270AR barrel.

Velocity over my Oehler 35P chrono.
Conditions: started at 50 degrees, No wind. Ended at 75 degrees, wind 10-12 at my 8 oclock.

270AR
Krieger 26"
Lapua 6.5x47 converted brass
130 Federal Fusion pulls (Rocky Mountain Reloading)
CCI 450
2.298" oal
IMR 8208
Grns
Vel avg
ES
SD
35.5
2846
22
9
130 Federal Fusions pulls
CCI 450
2.298" oal
Leverevolution
Grns
Vel avg
ES
SD
36.7
2760
11
7
37
2740
8
5
37.3
2789
20
14
37.6
2824
40
28
37.9
2837
23
16
38.2
2872
52
36
38.5
2865
66
46
38.8
2914
18
12
130 Nosler Partition
CCI 450
2.298" oal
CFE 223
Grns
Vel avg
ES
SD
37.8
2763
55
29
38
2761
10
5
38.2
2777
2
1
38.4
2792
55
28
38.6
2808
30
21
110 Nosler Accubond
CCI 450
2.298" oal
IMR 8208
Grns
Vel avg
ES
SD
35.5
2939
19
10
36
2961
49
24
36.5
2992
24
12
37
3026
25
12
Dennis
 
#29 ·
Range day for the 26" Kreiger - 270AR..

270ARKreiger 26"Lapua 6.5x47 converted brass
130 Federal Fusion pulls (Rocky Mountain Reloading)
CCI 4502.298" oal
IMR 8208
GrnsVel avgESSD
35.52846229
130 Federal Fusions pulls
CCI 4502.298" oal
Leverevolution
GrnsVel avgESSD
36.72760117
37274085
37.327892014
37.628244028
37.928372316
38.228725236
38.528656646
38.829141812
130 Nosler Partition
CCI 4502.298" oal
CFE 223
GrnsVel avgESSD
37.827635529
382761105
38.2277721
38.427925528
38.628083021
110 Nosler Accubond
CCI 4502.298" oal
IMR 8208
GrnsVel avgESSD
35.529391910
3629614924
36.529922412
3730262512
Dennis
numbers look good and comparable to mine dennis.

how you liking the krieger?
 
#31 ·
Don't remember if i shared this with you guys or not. here is some data collected with my 26" krieger 270AR. i was looking to see what the difference was between cfe and leverevolution. in the 20 inch barrel i had there was 25-50 fps difference with lever getting the better velocity.
well as you can see the longer barrel really makes the lever shine pretty much 150fps faster across the board for the same charge weight and no i wasn't over max with lever. these were shot back to back same day. and were loaded right after each other when i was loading them. only difference is the powder.

 
#32 ·
OK, I finally get to contribute to the 270AR load data section. All loads are using Leverevolution powder and the temperature was 93-95 degrees(yes, very hot outside). I shot five shots with Nosler 130 grain Ballistic Tips loaded out to 2.295. The other loads were with Sierra GameKings loaded to 2.250. I used Lapua 6.5x47 brass and CCI 41 primers. I'm very impressed with the velocity of the SGK's and I can still load higher. I'm not really running into pressure signs yet. I'll try to post a picture of the brass. My groups weren't the best in the world but the last group I shot with the SGK's was about 1.5 inches. I'll fine tune and see if I can get it tightened up some.


130 grain Nosler BT's
38.5 grains LeverEvolution
6.5x47 Lapua brass
CCI 41 primers
2.295

1.2854
2.2836
3.2866
4.error 2
5.2850


130 grain Sierra GameKings
38 grains LeverEvolution
6.5x47 Lapua brass
CCI 41 primers
2.250

1.2866
2.2869
3.2884

38.3 grains

1.2889
2.2900
3.2908

That's right. 2900 fps with the GameKings. Granted it's 95 degrees outside but wow. I really love this round.
 
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