.303 British 180 gr cast - Powder Options?
I was finally able to locate a Lyman 314299 mold last month. I have been loading them over various charges of Unique with mixed results. My issue is this. The Lyman Manual only lists 4-5 powders for this bullet, non of which I have aside from Unique. I really want to get up above gallery load velocities. Do any of you have experience, or other manuals to reference? I have heard tell that H380 can be used, but have seen no credible data. I have probably 20+ assorted powders in my case. Any help appreciated.