Eric.......I assume you are talking about a southern mountain rifle? I would use it, can't see anything wrong with it, will feel
better than a straight octagon barrel. You have to realize that many of those guns were made using hand forged barrels, and
you might see any kind of barrel on them. Even swamped barrels, and I have seen some where the muzzle was bigger than
the breech.....strange, but they did it nontheless. So, how could you go wrong in using your straight tapered barrel? I would
use it, should work out great............Don