looking at an AAC SDN-6 with a blackout 51T flash hider on a remington sps actical AAC-SD rifle as the primary. i i want to use the same can on my stag carbine, is the 51t fh for the .223 the only thing i really need? are the overall dimensions the same so a .223 FH will fit a .308 can? how effective are the larger cans on smaller rounds? i imagine a slightly louder report as the exit hole is slightly larger but is this neglibible or is it a noticable change from using a caliber specific can?