On a serious note..., I should think that the manner of fastening most muzzleloaders to the stock, either by bands, or pins, keys, or screws, that those methods would interfere with vibration. Anything dovetailed into the barrel will change the thickness of said barrel at that point, would it not?
I thought barrel vibrations from harmonics and/or "whip" was something that concerned folks with free floated barrels set in modern receivers.
:idunno:
LD