not really, any ballistics on a 444+ grain conical wont be that great. 45-70 was a 600-800 yard gun, even some muzzleloaders back in the original days used to shoot huge slugs for competition and sport hunting.
Long range shooting, a heavy bullet is what you want to retain energy and its also less affected by wind.
One reason i like my 58. It does have poorer ballistics over the 54 but that big ball is going to leave a big hole in what ever it hits.
