Yep, .223 currently not permitted, and 6mm minimum caliber. Ray Schafer cast targets are fine. The old ones from EMI(?) have breakage problems on the chickens and rams. Chickens would break off at the foot, and rams would either have the horns or nose shot off. Why use the body when a head shot is more challenging :-D . Our average on chickens is 1.8, and 0.5 ram breaking per match. Once we switched to the Ray Schafer targets, no breakage. On Ray's chickens the leg cross section has been increased slightly to better withstand the bullet energy. We also have some welded SB targets, but welds crack after a while and need repair.