I'm sure technology has outstripped the old laws. Back when muskets, Hawkens and Kentucky rifles was about all there were, my era I guess you could say, nobody could have ever foreseen the urge to turn muzzleloaders into the equivalent of centerfire rifles, capable of 200+ yard shots. I don't have the slightest bit ofconcern about Spanish barrels, but then I'm a traditionalist and am sticking with the old stuff and the relatively mild loadings.