120gr Hornady SST info - Page 3
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  1. #21
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    Quote Originally Posted by WVHunter1s1k View Post
    This is weird. Hornady factory ammo lists 120gr at 2460fps. They are usually underpowered.
    I wonder if H335 or Reloader 12 would work better? Just thinking out loud.
    They haven't made Re12 in years but H335 should work very well with 120s. I can get more vel with 115s and 130s with H335 than any other powder.
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  2. #22
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    Quote Originally Posted by constructor View Post
    They haven't made Re12 in years but H335 should work very well with 120s. I can get more vel with 115s and 130s with H335 than any other powder.
    Cool!
    I saw it listed on the burn rate chart. Old chart I guess.
    I was thinking a slightly slower burning powder would be needed to push the heavy 120gr.
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  3. #23
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    Quote Originally Posted by WASSMAN View Post
    I get around 2700 out of my handloads. Makes them just as potent as the TTSX.
    Out of what length barrel? Please check your numbers / chrono again.

    120 SST from 6.8 SPCII, even loaded out to 2.333 or even longer, will be in the 62,000PSI range at 2600 FPS. That load is probably dangerous if you really got them to 2700.



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  5. #24
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    Quote Originally Posted by constructor View Post
    They haven't made Re12 in years but H335 should work very well with 120s. I can get more vel with 115s and 130s with H335 than any other powder.

    H, are you getting more velocity, with these bullet weights, out of H335, than AA2200?

    H335 is old ball technology and the AA220 ( as you well know) is the newer double based spherical version that should give higher velocity at same case fill %. I just assumed that H335 couldn't beat any of the St. Marks' powders.

    Did you try them head to head?



  6. #25
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    Quote Originally Posted by HTR View Post
    H, are you getting more velocity, with these bullet weights, out of H335, than AA2200?

    H335 is old ball technology and the AA220 ( as you well know) is the newer double based spherical version that should give higher velocity at same case fill %. I just assumed that H335 couldn't beat any of the St. Marks' powders.

    Did you try them head to head?
    No I haven't. I was shooting 130s at 2520fps and the 115s at 2800fps with H335 a year before I met you and Art so that was before I changed the land to groove ratio in the 11 twist barrels I was making. I think 2200 has a faster burn rate and hits max pressure before the case runs out of capacity frm what everyone else has posted here.
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  7. #26
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    Well what you waiting fro we are dying to know!
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  8. #27
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    Quote Originally Posted by WASSMAN View Post
    My second favorite load. almost the same energy as 95 TTSX, but a little less accurate, but half the price. My opinion a great alternative to the 95's. This load is always in my pack as a trustee stand-by.

    the load SSA brass CCI 41's 27.4gr of AA2200 COAL 2.270. 3/4" @100 with 2679fps avg.
    Wassman, your chrono is reading high. Your load is 0.1 grains less than mine, but the velocity you're quoting is 100 FPS more.

    Even with the bullet seated out to bolt gun OAL, I got up to 28.5 grains of AA2200, and never got any higher than 2634 FPS.

    Once I got past 28 grains, the velocity stopped increasing, and I started to see primer flattening at 28.5. My bolt gun barrel is 18".

    I've never seen anyone hit 2700 with the 120 SST. I'm pretty sure your chrono was giving you erroneous readings.



  9. #28
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    AA2200 seems to be the most efficient in longer barrels. Here are three more of my 120 gr. SST loads with 2200. I tried 28.2 gr. and it was too hot and accuracy was erratic.

    68_120_2200.jpg
    Last edited by JerBear; 03-08-2012 at 06:22 PM.
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  10. #29
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    I believe Wassman is shooting a Stag 7 with a 20.77 inch barrel and gaining 36 fps per inch of extra barrel. That is the shiz right there.

  11. #30
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    Shot a box of factory loads today. Hit where they should every time.


 

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