[Batchokookies]

+1 on Stealth

To go into a bit more detail, The entire circumference of the muzzle needs to be perfectly proportional. If you have little nicks on the end of your barrel, or the bore diameter isn't "eased off" or crowned (expanding at the end, like you see on all new barrels), the gas pressure isn't evenly distributed around the bb when it leaves the barrel. In the case of burrs or shavings, they can either graze the bb on it's way out, or as I said before affect the gas pressure, both of which affect accuracy. In the case of sawing off your barrel without easing it off, even the most minute difference in barrel consistency at your muzzle will throw off the trajectory simply due to the rapid change in pressure. Even if the barrel was perfectly cut and cleaned up, the difference in accuracy between a crowned barrel and a "blunt" barrel if you will is quite dramatic.

Well at least theoretically. I doubt it will be noticable for airsoft at a hundred feet, but it sure makes a difference in a .308 at 100 yards.

Cheers