300 Blackout Velocity Test - 10.5" vs 16" Barrel

300 Blackout Velocity Test - 10.5" vs 16" Barrels.
The common conception is that the .300 BLK was designed to be at its full potential by 9" of barrel, we test that theory by running 10.5" and 16" barrel lengths over the chronograph using supersonic ammo.

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