I have a model 744 (monson) I been playing around with cast bullets. I cast with wheel weights and a rcbs 245 sac mould (pain base) At 25 yards there Great, at 50 yards 2 -3 inches but, at 75 yards I have a hard time hitting a 10" steel plate. I get no leading. I tried many different loads Win 296 is the best at max. I just started casting and I made a mistake ordering the mould, I wanted a gas check. So the question is, do I try a RCBS 240 swc gc or a 300swc gc mould? I know I should ask at the cast bullets section but I figure I give the Dan Wesson guys a chance.