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220 Swift

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6 comments

  • hipshoot
    Can anyone give me the guff on 220 Swift in a Ruger M77? What's the barrel twist ratio and how's the velocity compare to .223 in similiar grain projectiles? Also trajecory. Thanks
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  • charliemeyer007
    If it only happens once it must have been a defective projectile. I have a smooth bore (from being shot out) 256 Newton that would only produce patterns of key holes.
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  • bpost
    I would bet you had a bullet with a core that was way out of balance, rare but it happens..
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  • Ambrose
    As I recall, the "Blitz" bullets by Sierra were designed to fragment at lower velocities as in the .222 Remington class of cartridges. The standard Sierra spitzers should work better in your Swift. I once fired some 50 gr. Hornady SX bullets @ 3375 fps from a 1-12" .223 and the bullets had started to yaw as they went through the target. They shot fine @ 100 fps slower. Bullets do funny things when fired too fast.

    EDIT: I think it unusual that your Swift has a 1-12" twist. the ones I have are 1-14".
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  • 5mmgunguy
    The Sierra Blitz is a light jacketed bullet designed for the 222 Rem and such...I think Sierra say limit velocity to 3500/3600 max. The bullet that keyholed was probably coming apart.
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  • hipshoot
    Glad to hear it might have been a defective projectile. I forgot to mention it is a 1-12" twist. I will try some loads at a lower velocity.
    Thanks for all the info!!
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