Bear Creek Arsenal Complete Uppers

[Dcommoncents]

My 18" fluted BCA barrel has been sub moa from the first groups I shot. For those of you who saw improvement after some break in, was the improvement any where near enough to fix the type of 5" groups like 1Shot is reporting? It's interesting some of you experienced improvement because now that I think about it, I recall the BCA rep I spoke with before I received my upper expressing interest in whether I would observe the need for a slightly extended break in process given the nitriding in the bore.

And 1Shot, what type of ammo were you using when you got those bad groups?