I want to cast for a 375 H&H, I need bullet and powder recommendations. I'd REALLY like to stretch the bullet out as far as possible, too. If I can shoot far enough then I can skip shooting jacketed when I want to go farther than 100 yards. If I could shoot an 18-24" circle at 700 or 800 yards I would be floored. But if I had a good bullet that could get me to a 10" circle at 300 yards, that would be great too. If I have to settle for 100 yard accuracy only, so be it, but I'm really hoping I can push out there.
(If I could grow a horn on this horse to make it a unicorn I'd ask for a plain base bullet too)
Any suggestions for a good bullet to do this, and what powder would get me there?