If i use 50 cal RB data for a similar weight bullet in a different caliber what will i get? I can get my chrony out once it dries out and find out for sure... But my 40 caliber REAL mold throws a 197 grain bullet. The previous owner used 60grs fffg, but idk if he knew the velocity. Being a 50 cal RB is 180grs would a similar charge of fffg give a similiar estimated velocity? I plan on starting at 60 grs, mebbe bump up to 70grs and see what kind of accuracy i get. Im also thinking a wad between powder and conical is a good idea. Any ideas?