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Thread: Vihtavuori N530

  1. #1
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    Default Vihtavuori N530

    Anyone tried this yet in the 6.8? There was an article a while back in 6mmbr on its use in the Grendel http://www.6mmbr.com/65grendel.html

    The Vihtavuori 500 line of powders are double based with a shot of nitro celluose for good measure.

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    I have used various VV powders for years but not in the 6.8 ........yet.

    VV makes great powders...clean burning and very consistent....that's why many competitive shooters use it.

    compare burn rates and look for info here: http://www.eabco.com/VihtaVuori01.pdf

    I'll probably look into using VV in the 6.8 sooner or later.

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    Quote Originally Posted by MajorJim View Post
    Anyone tried this yet in the 6.8? There was an article a while back in 6mmbr on its use in the Grendel http://www.6mmbr.com/65grendel.html

    The Vihtavuori 500 line of powders are double based with a shot of nitro celluose for good measure.
    They are a little too slow for the 6.8. 120 may work with light bullets, 130 and 133 with 110-115gr bullets.
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    I like to use VV in my 45acp and other pistols because it is so clean, so I tried to use a VV rifle powder VVN130 for the 6.8.

    So far, in 6.8 SPC I have only used it at an indoor range and had to wait for the white smoke to clear before I could see to take the next shot. I believe the powder is still burning or some unburnt powder leaves the barrel of my ARP Recon.

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    The N530 falls between their 130 & 133 as far as burn rate goes. I have this powder and intend to use it for 6.8SPC but don't want to be the pioneer as far as home brew loading data goes. 26.1 grains is considered max in a Grenedel dricing a 107 SMK.
    AA uses 50,000 psi +/- because of the reduced strength of their larger faced bolt.

    That loading should give me a starting point for 110 grain 6.8 loads. Perhaps 25.0, 25.5 26.0 and 26.5 grains of this powder could be tried with a 110 Hornady or 110 Nosler combined with cronograph readings should find a useable range for this powder. The bore of a 6.8 is slightly larger than 6.5 which will reduce pressure, the case capacity is very close. These are tests I would prefer to have at least one data source to rely on, especially VihtaVuori's would be nice.

    I beleive this powder is well within the operating range for our round and needs to be explored.
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    Quote Originally Posted by borderpatrol View Post
    The N530 falls between their 130 & 133 as far as burn rate goes.
    Not according to VihtaVuori burn rate chart. N530 is slower than N130 and N133.....check above link for burn rates.

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    Quote Originally Posted by Dipper View Post
    Not according to VihtaVuori burn rate chart. N530 is slower than N130 and N133.....check above link for burn rates.
    Ditto,
    I have Vu's reloading guide in my hand, according to this 530 is the same burn rate as 4895.
    It may work on flat based 130gr bullets like the speer where there is more room in the case.
    SIX5 -6.5mm on a 6.8 case-vel of the 6.8, BCs of the 6.5
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    Post GS custom bullets load with VV N110

    I thought I remember seeing GS custom bullets website showing a load with their 80 gr. bullet using VV N110. http://www.gsgroup.co.za/hvloadsmed.html
    They show their 80 gr. HV bullet with a starting load of 20 grains VV N110
    Last edited by Frost84; 08-23-2009 at 10:32 PM.
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  9. #9
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    Looking at the burn chart, it is also similar to TAC. If it is a ball powder, it should work pretty well with the 110+ GR bullets.
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    It's a very fine extruded powder, and I do mean VERY fine. It meters as well as ball powder. Very dark and glossy looking kernels.

    The reason "I" say it's close to or in between V-130 and V-133 is the charge weights VihtaVuori lists in their manuals. Their maximum charge weights when listed in identical loadings "usually" shows N-530 as having the same powder charge and sometimes less than V-133 using the same bullet. This usually means maximum pressure is reached with less powder by weight in the same case. Faster powder. Lots of their data shows identical charge weights between V-133 & N-530 on maximum loadings. They are very very close to one another.

    VihtaVuori 4th edition

    6.5 Grendel

    100 grain Scenar max loadings:

    27.2 grains of N-130
    29.3 grains of N-530
    29.3 grains of N-133

    108 grain Scenar max loadings:

    26.1 grains of N-130
    26.7 grains of N-530
    27.8 grains of N-133

    123 Scenar max loadings:

    26.7 grains of N-530
    26.7 grains of N-133
    27.0 grains of N-135

    The Grendel case is very similar to 6.8 both in bullet weight and capacity. Burn rates can change on the scale depending on the cartridge being loaded. Their .223 data also shows N-530 being very close to N-133 but swapping places, so to speak. 69 grain Scenar shows a maximum of 22.7 grains of N-530 and only 21.9 grains of N-133. N-140 shows 24.7 grains as max.

    They even have a couple of loadings listed for Lapua's 150 grain .308 one is 1.1 grain lower than N-135 in that cartridge, and .3 of a grain higher than N-135 with Lapuas 155 grain bullet.

    According to Lapua's data using the only case close to ours (6.5) the N-530 and N-133 are very close to each other in that application. Lapua also states that N-530 is best all purpose powder when loading the Grendel. It's got my curiosity. My hope is Lapua will add 6.8SPC to their next manual.
    Last edited by borderpatrol; 08-24-2009 at 12:54 PM. Reason: spelling
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