Another Option:
For those with a Ruger 45-70 sitting around... I have been told (but haven't called them about it) that JES Reboring will bore out Ruger No.1's in 45-70 to 50-70 Govt.
The 50-70 case is 1.75 inches long.
Starline makes the brass, graf's also stocks it.
Jerry
OK I've got to eat crow here... I called JES Reboring
They told me that you would probably run into trouble with the rim diameter on the 50-70 Govt. in a Ruger No.1
He recommended going with a 50 Alaskan which has a smaller rim diameter.
Though the 50 Alaskan is a straight walled case... it probably will not work in the 'restricted' states as the case is 2.1 inches long.
50 Alaskan brass is available from Starline;
https://www.starlinebrass.com/brass-cases/50-Alaskan-Brass/Jerry
