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7.62X39 Barrel Length Velocity Chart

7.62X39 Barrel Length Velocity Chart - They key take away point is that 300blk has a much lower velocity loss as you shorten the barrel versus 5.56 nato. 300blk is effective in short barrels but long barrels still put out more energy,. You get almost complete powder burn in this range. If you're going to be doing something like hog hunting, longer barrels will yield more muzzle velocity up. If you're just going to plink, any barrel length with be fine. 7.62x39 is not a high pressure high velocity round like 5.45x39 or 5.56. So it isn’t super dependent on barrel length like those two other rounds. “x39 retains excellent velocity in short. Around 13” is where the ft lbs really seem to not grow much per inch, the gain is cut about in half after that point. A good, fairly involved and interesting older (2016) article with examples on how barrel lengths effect 7.62x39 ammunition velocity being used.

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