PRC twist rate 7,7.5,8?

Discussion in 'Long Range Hunting & Shooting' started by Gobears16, Aug 11, 2019.


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  1. TXAoudadKlr

    TXAoudadKlr Well-Known Member

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    Some say groove count has just as much to do with jacket failure as twist rate.

    Obviously too much spin is gonna cause it to fail but groove count can play a factor in the bullets survivability in a given twist
     
  2. Dirtrax

    Dirtrax Well-Known Member

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    Mar 23, 2014
    Not necessarily. I think others have more experience in this area indicating that it actually helps. But the bullet must get there intact. Stability is not a formula that one reaches and then can expect increasing gains without a compromise somewhere. If more twist is always better were a constant we’d all be shooting 1:1 twist in everything.
     
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  3. Dirtrax

    Dirtrax Well-Known Member

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    I think that may be a factor but too much of a good thing is still too much.
     
  4. chetraguse

    chetraguse Well-Known Member LRH Team Member

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    If you look at Berger's twist rate calculator for what your wanting to shoot it'll tell you what twist you need. It seems to be a good tool.
     
  5. swd

    swd Member

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    I’m shooting 156 Berger’s out of a 7.5” Brux in a 6.5x55 Ackley and they’re shooting very well. I don’t see a need for 7”.