I picked this gun up inexpensively because the caliber and wood condition. I’ll restock it once I get it shooting. Cartridges of the world doesn’t mention it. Would anyone have cartridge dimensions? I’ll do a chamber cast but have little hope of finding anything. I’ll probably just reline it. It is the same size action as my other two rifles. They are chambered in 360 No 2 and relined to 32-20, respectively. I wonder if 44 special would be possible.

Hoyem lists it: Rim .503
Head .449
Case mouth .438
Bullet Diameter .442 (photo looks like a heeled bullet)
Case length 1.02
Overall length 1.54

.442 carbine Bullet weight 220 grains
Black powder 20 grains

Thank you Rglenz. Kind of a short fat thing. I think I’ll reline it. 357 Mag would be worthwhile if the action is strong enough

I have a little Martini in 442 rook with a near mint barrel. Also have 2 original rounds and determined that 33 Russion or 44 Schofield will almost chamber.

I have a bullet mold and a 'smith to run the reamer in.

Have found a couple of original rounds one by Kynock and one from Eley. A 44 Special almost fits so I'm thinking of running a reamer in to chamber this. Using a 38/40 FLS I can neck the case down to hold a 200gn heeled bullet.