I shoot cases of Wolf .223 55gr H/P's for training every year using a early 90's built Bushmaster M-4 clone with a standard USGI spring and carbine buffer without issue.
Bolt cycling and ejection are strong and this set up works very well for me but since it is said that most Bushmasters are over gassed if this condition exsists within my rifle it may be helping function with the weaker powered Wolf.
I also have about a half a case of Wolf through my new Adams Arms Mid-Length piston upper using a standard A2 lower with rifle buffer and spring. So far zero problems and 100% function.
