Throwing 307-grain bullets at 1,050 FPS from a 12.5-inch barrel, 338 ARC packs a punch and does it quietly with a decent suppressor. Muzzle device and suppressor were pulled off my semi-auto 338 ARC build, both from TiON. Because of that, the ejection port is small for the fairly large 338 ARC brass to eject. But those same magazines work fine in my other 338 ARC upper. 338 ARC is a great cartridge, and the TiON Dragoon 8.6 with a bolt action makes the system Hollywood quiet.