So I'm new to reloading cartridge guns with cast boolits, and I'm trying to reload for my 303, the bore i slugged around .314 .315 so i cast and loaded some cartridges with a 203g linotype .316 boolit on top of 38g of h380 (i know I've heard it's not really a cast bullet powder but it's what i have from reloading jacketed)
Odd thing is, when I took it to the range, nothing was hitting at 50 yards, shortened up to 25 yards (almost "point blank" for this guy) and still not on paper, I'm not sure where its hitting if at all, out of frustration I load it with some factory 174g jacketed and a 5 shot group in 3 inches dead center.
What am I doing wrong?