So I am embarking on load development for 45-70 subsonic using the 410 sub-x. I actually have a recipe in an old Lyman manual for a 410 gr jacketed bullet that uses unique. I don’t have any of that powder on hand. I do have clays, universal, true blue, and longshot. Universal is right next to unique on the burn rate chat and true blue is very near trail boss. Is there a way I could infer a decent starting charge for this endeavor with one of those powders?
I’ll let y’all know if I blow my face off.
I’ll let y’all know if I blow my face off.