Interesting article in the May 2017 issue of SWAT magazine. The author tested a 9mm carbine with various ammo, shooting from the bench.
Average 5 shot group sizes at 50 yards were:
Atlanta Arms 115gr JHP--1.55"
Black Hills 115gr +P JHP--1.25"
Winchester 115gr FMJ--1.88"
These groups, scaled to 25 yards would be 0.78", 0.63", and 0.94".
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