I'm wanting to purchase a single shot that I can rechamber to this cartridge at the most inexpensive way possible. But I don't know what to look for as far as a donor rifle. I know the barrel has to be 25 cal, but what existing caliber in the donor will give me the correct twist for cast boolits? If a single shot bolt action, the bolt face must work in the rim of course. If Henry made a 25 caliber suitable in their single shot it would seem it might be a donor without a great deal of modifications if the twist was workable. But, I'm not aware that Henry is chambering anything that's usable. Maybe a bolt action savage in 30-30. Just have a new barrel reamed and threaded for the savage action. Wishing I knew more on this. Hopefully y'all can provide some more information and ideas for me. What I'm not looking for is a lever action. Either a bolt, roller or break action. It would be great to just have to ream a new chamber but I'm never that lucky on my projects.