JD,
I have helped in Franks shop a bit and his Iron is as good as the original. I needed one as I got an action with out the iron. Have two original barrels a #4 .22 short and a 32-40 factory pattern barrel that is new never blued much like the .22 Musket pattern barrels I have in the Campbell book. The major difference is the the 32-40 has several factory marks un-like the .22 patterns that have paper tags attached.
Frank has one musket take down barrel but he got stuck with it was re-chambered which the seller forgot to mention and then said too bad you can hate me forever but it is now yours. I am looking for a #3 or heaver barrel may have to make one but like the idea of having the factory markings.
Cheers,
Laurie