before you can sabot it, you need to know the diameter of it so you can put the proper sabot on it. I do not see why it would not work. I would think you would be just as well off getting the same bullet or like it in a conical but in the .50 caliber range. It might not be as fast but the down range energy would be greater, hence more knock down and punch through power. Besides a 1/2 hole through any thing vital has to hurt.

One other point is many rifle bullets are high in BHN and they do not expand the best at the low speeds that muzzleloaders push them. They work best if you can get them in a 5 BHN or that area. Those are pure lead and will expand much better.