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AR15.COM
10/26/2007 8:39:18 AM EDT
I'm only guessing because some of the gas escapes, but not sure if that is after the bullet has already exited the barrel.
10/26/2007 8:59:58 AM EDT
[#1]

Quoted:
I'm only guessing because some of the gas escapes, but not sure if that is after the bullet has already exited the barrel.


Yes, but not much.
10/28/2007 7:20:02 AM EDT
[#2]

Quoted:
does a ported barrel decrease velocity?


It could, but it depends if you are talking a factory type ported barrel or one of the aftermarket barrels where the ports are out side of the slide.
Factory barrels loose about 40fps when ported, the aftermarket barrels with ports past the end of the slide don't.