normally when a State outlaws the .45 caliber its because of the roundball. Their concern is that for large and or dangerous game animal, the .45 roundball just would not cut it. But we all know that with the introduction of sabots and the quality of projectiles now on the market, along with some excellent velocities due to powder advancements.. the .45 caliber muzzleloader is a very lethal caliber. But I can understand your concern on large and powerful game like the deer you describe. I have three or four .45 caliber rifles. And if I were going on the same hunt as you, with that same caliber.. the only projectile I would be comfortable with is a large conical bullet. Like a Bull Shop or No Excuses. Maybe Thor makes an all brass conical in that caliber. Its worth checking into. The reason is, while the velocity is not there, the penetration and down range energy is. I have a White M97 in .45 caliber and I would go on that hunt tomorrow with a 460 grain Bull Shop conical. I just think it is a very lethal weapon.

It sounds like an exciting hunt. Keep us posted on the projectile you choose and the outcome of the hunt. And good luck.