will 1/8 twist stabilize 247 bison bullits

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imyomama
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will 1/8 twist stabilize 247 bison bullits

Post by imyomama »

thinking of getting a dedicated barrel to shoot the lead bullets ... would 1/8 twist 16" barrel stabilize the bison 247's cast

any info appreciated as always!
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ohl_san
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Re: will 1/8 twist stabilize 247 bison bullits

Post by ohl_san »

Try this calculator for a better idea on stability. Just insert your barrel and bullet info.

http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi
nothing is more powerful than a young boy's wish. Except an Apache. Apaches have machine guns & missiles. It is an unbelievably impressive complement of weaponry an absolute death machine
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imyomama
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Re: will 1/8 twist stabilize 247 bison bullits

Post by imyomama »

link no workie!
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ohl_san
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Re: will 1/8 twist stabilize 247 bison bullits

Post by ohl_san »

Yeah that's crazy looks like the site is down now, hopefully it comes back online soon
nothing is more powerful than a young boy's wish. Except an Apache. Apaches have machine guns & missiles. It is an unbelievably impressive complement of weaponry an absolute death machine
TED
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ohl_san
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Re: will 1/8 twist stabilize 247 bison bullits

Post by ohl_san »

imyomama wrote:link no workie!
Sites back up, link works now.
nothing is more powerful than a young boy's wish. Except an Apache. Apaches have machine guns & missiles. It is an unbelievably impressive complement of weaponry an absolute death machine
TED
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300Blk
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Re: will 1/8 twist stabilize 247 bison bullits

Post by 300Blk »

It should stabilize them.
45r
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Re: will 1/8 twist stabilize 247 bison bullits

Post by 45r »

1 in 8 twist worked with my noe 247311 cast bullets.
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Maryland_Shooter
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Re: will 1/8 twist stabilize 247 bison bullits

Post by Maryland_Shooter »

MBC 245g subs work in both my SBRs, so YES is my answer.
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imyomama
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Re: will 1/8 twist stabilize 247 bison bullits

Post by imyomama »

well , i just got an email that after 2 months .. my lead bullets are shipping!!! so, now i'm waiting for my bergera barrel to arrive as well... anyone has a good recipe for these on 16" barrel 8 twist? i assume a lead bullet will be slicker than my usual 220 smk and probably will require less powder ???

anyone with load data , care to share ?

thank you!!!
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Maryland_Shooter
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Re: will 1/8 twist stabilize 247 bison bullits

Post by Maryland_Shooter »

imyomama wrote:well , i just got an email that after 2 months .. my lead bullets are shipping!!! so, now i'm waiting for my bergera barrel to arrive as well... anyone has a good recipe for these on 16" barrel 8 twist? i assume a lead bullet will be slicker than my usual 220 smk and probably will require less powder ???

anyone with load data , care to share ?

thank you!!!
Powder? Gas system length? You wanting subs or supers? BTW, you can't push that projo too fast :|
When I go to bed a law abiding citizen and wake a felon, by the stroke of the legislative pen, tyranny has arrived.

Post complete and accurate info when inquiring about loads, or be ignored.
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