Hey kids. Long time. Looking into a suppressed SBR. Either AR-15 or AR-10 platform. I already load 5.56 and 7.62 and have mags for pretty much any typical semiauto rifle. Been looking at .300 blk but not totally blown away by ballistics. Also .458 SOCOM and the usual big thumpers. I've made subsonic .308 before but don't see any advantages there. (Are there any necked-up thumpers based on that parent round?) Anyway, what's the consensus on caliber for a suppressed SBR? Extra points for using stock mags, or at least factory mags that really run every time.