Dwell Time is amount of time the bullet spends in the barrel after it has passed the gas port.
Post Port Lengths (Carbine Gas System)
16 barrel = 9 post port
14.5 barrel = 7.5 post port
12.5 barrel = 5.5 post port
11.5 barrel = 4.5 post port
10.5 barrel = 3.5 post port
So what are the dwell time percentage increases and decreases between these barrel lengths?
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