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Old November 30, 2012, 05:37 PM   #3
Senior Member
Join Date: December 24, 2008
Location: Loveland, CO
Posts: 1,475
Whats the reason for the bullet making keyhole or oblong hole in target instead of nice round hole.
Short answer: the bullet is tumbling

Longer answer: if the bullet isn't spinning at a high enough rpm to stabilize it, it will begin to lose it's axis and will eventually tumble. There can be many things that cause this.

If we know more about the firearm being used, we can make a better analysis.
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