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Ever see a curve of the expansion of a gas? really depends on the propellant, but it more or less resembles a curve like that of x^4.
Ideally, you'd want the barrel long enough so that you can accelerate the bullet up to its maximum but short enough to cycle the gas system, easy to handle, etc.
BTW, accuracy of the weapon is not dependent on the barrel length, but rather how good it's bored and how good the tip of the barrel is in regards to not making turbulance as the bullet passes through it.
some great pics, too, lmao.
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True forgiveness comes not from those who pull the trigger, but from those who have
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