im shooting powerbelts out of my 50 cal tc flintlock hawken....works fine so far.....now to test them on a deer................it loads alot easier then a sabot too...only thing is i cant get a second one in.....i HAVE to clean....i tried this summer...barely made it....i fought for dang near 5 mins trying to get it down there.....the first one slides down like you put butter all around it.....but i wont try a second again....granted it was hot humid and turned my fouling into a very very thick tar almost.....and my bore is pretty tight.......