The 32 idea case length is 1.77, head is .411
25-35 is a bottle neck 2.043 long, head .506
30-30 head is .506
25-25 length 2.37, head .376
25-36 Marlin base .500
25-20ss length 1.63, base .378

On these old guns the barrel head recess can be over sized compared to the actual cartridge head.
The 32 ideal bullet uses .323 very close to the 32-40.
Really need to get a casting of the chamber but the 32 Ideal looks like a pretty good candidate.