I've got a TC Hawkens and I like it, my middle brother has an in-line muzzleloader which I hope to shoot this year.
But I agree an in-line is almost like shooting a paper hulled cartridge rifle.
He uses a shotgun primer, synthetic blackpowder that come in 50 grain pieces and a sabot 44 cal pistol bullet. AND it has a synthetic stock
I just can't call that muzzleloading