I recently plunged into the 300blk pool with a factory upper for one of my sbr's. Having done the reading for years, I get that the original design philosophy and use case was for short barreled suppressed application. And I really like it.

So now I got to thinking; how would shooting 125gr supers out of a 14.7 or 16" barrel stack up against 5.56 or 7.62AK? In terms of ballistics and terminal performance, do the supersonic rounds hang in better than the subs past 200 or 300 yards?

I'm currently swimming in 5.56, so we're not talking replacement here. Just curious if I could make a go-to out of it. Anyone doing this or have any great insights? As far as gun buying goes, this should be like my 127th priority, but we know how that works out. You get the bug, you get the bug. Someone talk me out of trying this.