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Old May 16, 2013, 07:58 AM   #31
Willie Lowman
Senior Member
Join Date: March 5, 2009
Location: Uh-Hi-O
Posts: 2,586
In my limited experience, "SMG only" does increase the ROF in open bolt guns like the Uzi. The added pressure makes sure the bolt will travel far enough to engage the sear when the shooter lets off the trigger. As mentioned by James K, weaker ammo can cause run-away guns, especially if they are dirty.
"9mm has a very long history of being a pointy little bullet moving quickly" --Sevens
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