I'm sure this question has been rehashed to death, but with the new search engine I can't find a direct answer; is anyone finding that factory match .223 Rem is underperforming in rifles with the MK262 chamber? I ask this because I know the NATO chamber should have a longer throat and I'm not sure if (FGMM) 77gr .223 Rem has a shorter COAL than the MK262, and don't have a set of calipers handy to test this.