I've got a couple of .45-70s left, there's a .54 & a .62.
Muzzleloaders count, right?
I used to have a Ruger No.1 Tropical in .458 WM, but let it go in a fit of stupidity.
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Black powder rifles only count if you give us some details on them. In particular the flintlock. It has the look of a Rupp or Lehigh pattern.
Jeremy
Please fill me in with the details on that one!