264 win mag help?

Discussion in 'Reloading' started by danshae, Mar 5, 2009.

  1. danshae

    danshae Well-Known Member

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    I have been wanting to try some vihtvuori n570 powder for a while now but have no idea where to start due to no loading data?could i just compare it with something of a similar burn rate?
     
  2. Iron Worker

    Iron Worker Well-Known Member

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  3. Gunpoor

    Gunpoor Well-Known Member

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    Danshae, I would either look further for correct data or try another powder such as H1000. There is so much difference in density between powders of similar burn rate that you would be running blind through a mine field. I looked some on the net and found no data for this cartridge and powder, which seems strange to me if it was a viable option. The only VhitaVouri powders that I found used in 264 were N-140 for very light-for-caliber bullets and N-160 for other weights. I have used H1000 for my 264 and found it to be the best I have tried.
     
  4. danshae

    danshae Well-Known Member

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    what load and bullet do you use and what different powders have you tried?I was also thinking hodgen us 869 and imr 7828?thanks for the help.
     
  5. Gunpoor

    Gunpoor Well-Known Member

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    Danshae, My 264 has so much freebore that the only bullet I can shoot with good accuracy is the Hornady 160 grian round nose. I tried IMR7828 and I was getting extreme diviation in velocity and the accuracy just wasn't there, although some 264 loaders swear by it but I swore at it. As far as US869, I have never tried it in anything and stay away from ball powders in rifle cartridges but that is not based on anything but my own bias. My rifle (a real heinz 57) is a custom Encore barrel from E. Arthur Brown Co. that started out as a 6.5/06AI with 1 turn in 8" twist and then was sent to OTT (On Target Technologies) and Mike there rechambered it to 264 Win Mag. The barrel likes the bullets seated kind of close to the lands but I don't encroach too much as this is a powerful cartridge and it needs a little room, I try to seat around .010" from the rifling. For the medium large cartridges, which I consider the 264, I haven't found a better powder than H1000 but I haven't tried everything on the market. My S-I-L has a hand-me-down Weatherby Mark V Hand Select chambered in 257 Weatherby Mag, which has about the same case capacity as the 264, and that old rifle wouldn't shoot under 2.25"-2.5" at 100 Yds until he tried some H1000 with a rather heavy for caliber bullet which gave him .5" accuracy. H1000 seems to be a very predictable powder in cases of the rather large variety with the heavier bullets. I don't recall my exact load specifications and would rather you work up your own load as my rifle isn't a plain vanilla factory job which makes it rather quirky.