Gas Gun Break In

[Ronin22]

I get it bud as to what your saying. There will always be some wear. That alone is the gas cutting effect when the bullet passes the gas port and the gases flow up into the gas system.

What you don't want to see happen is a burr (that's what I would call it) build up. That burr sticking up is to me what causes the problem in terms of accuracy. Who cares if there is some erosion as you won't stop it as long as it's below the surface of the bore/groove as then it doesn't seem to be an issue.

Yes, the buildup before the erosion of that buildup is the problem. Thus there is a "break in" with this condition. The worst seem to be the .100 and above gas port size on the 18" barrels. No brainer cause there is a bigger hole.

 

[Wormydog1724]

That's what happened to my first one, a burr that was just being pushed down the barrel and wouldn't go away. Even with some JB bore paste and quite a bit of rounds. The second was a litle burr and eventually wore down but the erosion didn't seem to subside. This new barrel is much less expensive and looks terrible on a borescope, but shoots really good. My Krieger with 6k rounds on it shows hardly any erosion and shoots great.