I have had crappy luck trying to get my cast 45 caliber bullets to shoot well enough to suit me. Same with some coated and swaged Berry's bullets. Should I knurl them with a file? Could they not be getting enough friction in the sabot to take the twist? I am not trying to send them off all that fast either. 70-80 grains of 3F real black and Pyrodex out of my Encore 50 cal. Basically plinking loads. The bullets are LEE's 255 grain flat nose and the Berry's are.451 200 grain flat noses. The sabots are Harvestor Blacks. Is there a particular cast bullet out there that does really well in sabots?