I have long heard about the FBI's 12-18" penetration standard for determining an adequate load for self-defense, yet I'm now starting to rethink if this is needed. It seems to be that there are loads that have a great street track record, yet either don't reach 12", or just barely. What are some...
Link to video of test
Fiocchi 55 gr PSP fired from 16" and 11.5" AR pattern rifles into calibrated 10% gelatin. Both rifles are 1:9" twist rates and both had a Surefire FA556AR attached.
BB calibration: 596.1 fps, 3.7"
16" barrel results:
Impact velocity: 2,951 fps
Penetration...
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