12-13-2013, 04:28 AM
Klem Wrote:I heard from more than one old-timer one way to check the efficacy of your crown (apart from the obvious groups) is to fire a few rounds and look at the pattern of carbon on the crown, is it exactly even?
Interesting that you would mention this, because my non-threaded 24" BBL 5.56 consistently paints a very symmetrical "star" on the crown. Quite striking, as it is a stainless steel barrel. It also happens to be one of my more accurate AR's. I'll be sure to look for this, if/when I cut the 22" Grendel down.