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Old January 20, 2013, 04:47 PM   #12
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Join Date: March 6, 2006
Location: Central Florida
Posts: 3,324
IIRC, after exhaustive study, #4 shot is what the FBI settled on.

Of course, over penetration was a critical factor in their decision.

Edit: I just looked it up and # 4 birdshot is much smaller in diamter than the #4 buckshot that the FBI adopted. Sorry.
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Last edited by Microgunner; January 20, 2013 at 04:53 PM.
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