I just started firing powerbelt 50 cal 245s with Trip.7 50 grain pellets and Trip.7 209 primers all out of a brand new CVA Accura V2. The results - yuck! Very hard to load, more specifically very hard to seat, after just 2 rounds. I am not certain where the problem is. Prior to that my experience has been with a Knight MK-85. Used sabots with Pyrodex - no problems loading at all. The hard lesson I have learned: I bought 50 rounds of Powerbelts and 2 100 pellet boxes of Trip. 7. Can't return it and am now stuck with $85 worth of crap. Buy small quantities until you find what works.