Some of the BC's are kinda' short throated. Makes it hard to shoot ultra big bullets. You can do ok with 400-500gr. ahead of black powder. I shoot the Blackhorn because I'm too lazy to scrub and because I can shoot all day without serious cleaning. I shoot a 405 gr. hollow base cast bullet. It works great on a steel plate, don't know about a living creature. I can kill the steel at 800 yds. after a shot or two to zone in.