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223 key holing

DAMMITDONDAMMITDON Member Posts: 158 ✭✭✭
edited July 2012 in Perry Shooter Competition Shooting and Reloading Forum
I have DPMS 223 shoots great with factory amo.BBL is 1 in 9 twist when I shoot sub sonic [1125] amo I get key holes @100 yd.fine at@50YD.Do i need a different twist?,are what.
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Comments

  • Rocky RaabRocky Raab Member Posts: 14,429 ✭✭✭✭
    edited November -1
    Low velocity is the problem. Bullet velocity directly affects the spin rate, and therefore stability.

    Unless you are using a suppressor, there's no earthly reason to shoot sub-sonic ammo.
    I may be a bit crazy - but I didn't drive myself.
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  • charliemeyer007charliemeyer007 Member Posts: 6,572 ✭✭✭
    edited November -1
    Look at the bullet weight of your ammo. More than likely on the heavy end; you might get acceptabe results with the lighter end weight bullets.
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  • MobuckMobuck Member Posts: 14,088 ✭✭✭✭
    edited November -1
    That's why a certain twist rate will handle heavier bullets with a bigger case(more velocity).
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