.223 AR freebore

BeerAlchemist

Private
Minuteman
Jul 12, 2009
58
0
45
WA
How much freebore do you all recommend on a .223 AR, I'm setup with .020 right now, should I call it good or should I loosen it up a bit? The casing is sitting right at the edge of the cannelure so I can barely see the little ridges (55gr FMJ-BT).