One is a modern barrel, and I think is set up for paper patch. I've never messed with it, although I gave about 40 bullets, .45 cal and paper patched.

The other is a Norman Brockway picket rifle, probably made in the early 1870s, maybe even right after the Civil War. It is set up for cloth patches. Very short bullets, .43 caliber, maybe 200 grains. It's a back burner muzzle loader, with the load chamber behind the percussion cap & nipple, so the powder charge is critical.

Both barrels have 22" twists.