Yes it can be done, but that does not mean it should be done.
I have a Nagant that can fire 7.62x25 Tok. After seeing an ad in Shotgun News ten years ago I sent the cylinder away for conversion. When it returned it still had a substantial amount of metal remaining around each of the charge holes of the cylinder. I fired approximately 50 rounds of S&B through it. Lots of blow-back from the cylinder gap! Surprisingly accurate, 6" groups at 25 yards. Ejecting the cases was more difficult than 7.62x38R Nagant or 32 H&R Mag, but did not require anything more than extra hand pressure on the rod. It is now ten years latter and I still only have 50 rounds through the revolver. I think the reasons why this conversion did not blow the cylinder apart are: the Nagant cylinder is over built for 7.62x38R Nagant leaving enough extra steel after conversion and the enormous cylinder gap relieves the extra pressure of 7.62 Tok before it peaks, or I am just lucky. The pistol is not pleasant to shoot and luck can run out so I am done firing Tok through a Nagant. Spend a little more money for a Tokarev if you want to shoot 7.62x25. If you like, try .32 S&W or .32 H&R Mag. I would not attempt .327!