My. 30 cal cans have worked pretty great on .223, 6 ARC, 6 GT, 6.5 Grendel, 6.5 CM, .280 AI, 7 PRC, .308, .30-06 and .300 WSM. If you're new to suppressors and want caliber specific cans you should get them, it might be a learning experience on why you keep getting the lovely .30 cal...