What's the Best Barrel Length for .300 Blackout?

The .300 Blackout barrel delivers firepower and accuracy comparable to longer barrels. When you pair the barrel with .300 Blackout ammo, you get an easy-to-carry gun that spits rounds capable of penetrating

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Changed barrel length on my 300 to 6.25 from kak industries. 1/5 twist. Can't wait to take it to the range : r/300BLK

Barrel length vs. Velocity graph (5.56 and 300BLK) : r/300BLK