what bullet weight for a colt 9mm smg?

try a bunch of em and see what groups best- i've found the uzi likes 115 fmj - but it's open bolt-
 
I haven't reloaded for mine yet, but I was planning to try some of the heavier bullets first, like the 124gr RN..... I just figure with the longer barrel (as apposed to a pistol barrel) the heavier ones will work a little better... and there is really no recoil to worry about. :mrgreen: But I guess only time, and some reloading will tell.
 
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