Hope I a not hijacking this thread but would like to add to the conversation. Years ago my dad gave me a Krag-Jorgensen single shot bolt action and said it would work well for a 45-70. Only had to open the bolt face a few thousandths to make it work.
Well Crossfire put on a barrel and chambered it for me. We talked about making it a 45-100 but he convinced me to stay with the 45-70 since that is what I would shoot most.
Still need to make a stock for it but it test fired just fine.

If any of you know anything about those actions, I would appreciate knowing more.