I had my breach plug frozen tight on my T/C Black Diamond XR to the point where I had to use my scope as leverage to break it free. Since then I have lubed the plug well with T/C Super Lube and have not repeated the problem. I also have shot multiple times with Triple 7 without cleaning between shots, no problem. I do think accuracy may suffer though. At 50 yards, I shoot clover leaf patterns, but haven' t quite tightened the groups at 100. I' ve only shot 240 grain sabots though using 90 g of powder. I' ll try heavier bullets this year and see how that helps.