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Thread: Projectiles for a .223 with a 12 inch twist.

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  1. 25-10-2022, 07:16 PM #1
    Cigar
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    Quote Originally Posted by grandpamac View Post
    Greetings @Oldbloke.
    I ran the 60 grain VMax through a different calculator which gave me a stability factor of 1.3 which is marginally stable. @Cigar above found the 60 grain SP to be stable so this is a good indication. I have loaded some of the few VMax I have and will test at 200 metres over the next few days.
    Regards Grandpamac.
    The 60gr SP was a flat base bullet, which is more likely to be stable than a boattail of the same weight.
    Micky Duck likes this.
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  2. 25-10-2022, 07:22 PM #2
    grandpamac
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    Quote Originally Posted by Cigar View Post
    The 60gr SP was a flat base bullet, which is more likely to be stable than a boattail of the same weight.
    The 60 grain VMax is flat base as well but with a polycarbonate tip. The two look similar other than the tip.
    GPM.
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