Back to the original question: Will an 1863 Springfield barrel in the two-band length fit a cut-down stock from an original 1863 Springfield three-bander? In other words, do the two-band and three-band 1863 Springfield barrels have the same taper and profile?
I do want to stress that we're talking specifically about the 1863 Springfield rifle musket, not the "Zouave," the Mississippi, the Colt special, the '55 or the '61, or any of the various other muskets of the period. However, I have enjoyed the discussion and I have learned a few things about these interesting military weapons.
Anyway, I called Dan Whitacre this morning, and he answered yes, they do have the same profile and a two-band barrel should "pretty much" drop in the cut-down stock with little or no modification. He would know. This leads me to believe the original two-band M1863 Springfield rifle muskets were most likely cut-down three-banders rather than being purpose built in the shorter length, although there were certainly other models which were built from the get-go as shorter guns.
On a sad note, Dan kindly answered the phone from his hospital bed. He is not in the shop right now due to illness. I hate to see a good man down, and I hope you will join me in wishing him a full and prompt recovery.
Thanks to all who contributed their thoughts on this thread!
Notchy Bob