Ditch the powerbelts and the problem will go away. Trust me, I know. Unlike others who are "experts", my experience is with the Knight 54 cal.
Bill V
I take it you are using sabots of one kind or another Bill? If so have you had any issues loading them in cold weather? I am worried about them being a bit difficult once the temps drop but that may not be an issue. I have a few that came with the rifle so I might as well go give them a try.