I wouldn't exactly call full bore jacketed bullets conicals. I think bullets like the powerbelt and sabertooth are closer to a pistol bullet as opposed to a true conical is pure lead and which weighs around 400grains or more in 50cal.

Round balls in my gun aren't accurate past 50-60 yards, that would be the disadvantage in my situation. Plus with 75 grains of powder, they are losing quite a bit of velocity and energy. At 100 yards, I think a bullet would give you better penetration.