The T/C rifles will usually shoot Powerbelts OK; it is the other solidlead conicals that cause problems in the QLA T/C barrels. My Omega shoots Powerbelts and sabots OK. Not very consistent with solid conicals. I am less than impressed with Powerbelt performance on game. The lead ones shatter if driven too fast and the plastic tip copper coated ones seem to lack expansion and usually just go through without a lot of damage. Have not shot the silver ones.