I shoot 6mm and 6AI both,with equal disdain. They are hungchow in a short action and if going long,why form to less case capacity when the 6-06/6-06AI are so viable?

In a s/a the 6-284 is a better mousetrap than anything on the Mouser hull,due to COAL latitude...which brings a guy full circle back to boolits. A rifle can be no better than it's boolits and when COAL constraints preclude the good stuff,chamberings so plighted are easily passed upon,in order to get to the good stuff. Some boolits certainly rate building a rifle around and the aforementioned 105 is assuredly in such ranks.

The 243AI is 6MM Rem case capacity,with SAAMI 243Win COAL latitude. Win/win. The BR or any of it's Wildcat spawn,has never called me,mainly because I can't forget that I like speed. Same as 6mm's on the 223,22-250 or the like. Perhaps a PPC,if forced to suffer short range Bench Queen affairs. Very nice BC's at meaningful speeds,make a guy hate everything else.

I'm done with tight necks and long barrels too.