1) The .44 Magnum case shares similar dimensions at the rim and head with .303 British. (I used this fact when I had a beater Martini-Enfield from Australia in .303 rebarreled and chambered in .44 Magnum) 2) The .303 British also shares these dimensions with the 6.5x53R Romanian/Dutch Mannlicher cartridge. 3) Dutch Mannlichers are often found for sale cheap with shot-out barrels and beat-to-death stocks but usable actions -- here's one at Simpsons that's under $400 and pre-1898: https://simpsonltd.com/dutch-mannlicher-d16086/ 4) At one time the Brits made a number of very classy stalking rifles using the M95 Mannlicher turnbolt action 5) This sounds like the very plausible makings for a unique and awesome little 5-shot .44 carbine! FYI, I checked with my caliper and determined the 6.5 barrels are too skinny to rebore to .44 bore dimensions, so it would require a rebarrel job. On the other hand, I did a test using an old Dutch en bloc clip and found the controlled-feed action worked positively using .44 Magnum rounds, even without an extended feed ramp for the shorter case. I guess it's a sign of maturity or recognition of impending decrepitude that I had this idea yesterday and quickly realized that I'd never be able to follow through on it. There aren't any smiths around my neck of the woods I could trust for the rebarrel work, and the big shops further away would charge more than I'd want to spend right now. So, I hereby toss out the idea here to see whether anyone wants to run with it. Somebody please do!