It turns out that I measured the bolt face wrong.
I don't have any 32-40 on hand, but a 30-30 rim fits in the bolt. 32-40 sounds like a contender. Thanks.
You might need to do a chamer cast to be certain.
The .32 Winchester Special is basically the same case as the .30-30 necked up to take the same bullets as the much older .32-40.
The .32-40 is a Black Powder era cartridge that lasted into the smokeless powder era mainly as a target round, though its a fair Deer rifle cartridge.
The .32 Winchester was developed for those who liked the .30-30 balistics but wanted the option of handloading with BP as well as the smokeless powders which were still a bit unreliable at the time.
The "40" in .32-40 stands for forty grains of Black powder, while the "30" in .30-30 stands for thirty grains of the early smokeless powders used in the original loadings.
The .30 bullets were a tad less suited to BP, and the .32 bullets had the advantage of many years of use as target bullets with BP cartridges and were well designed for the purpose.
Both .32-40 and .32 Special cartridges should be available, and both are especially well suited to handloading.
Theres a similar German target rifle cartridge ,also used for the smaller European Deer, called the 8.15X46R.
.32-40 , also often used as a target round in Europe, cases are often trimmed and fireformed for use in the older german rifles chambered in 8.15X46R. the thicker rim of the .32-40 case is considered a plus in that it allows tighter headspace in those older rifles.
Find out just exactly which round your rifle is chambered for and you'll have a very versatile rifle indeed.
The .32 Winchester special is one of those I've considered for my custom Lee Enfield sporter project.
To be built on an unrestorable receiver of course.