Maybe a good place to post my current status on an M1 carbine in 7.62 X 25 TOK conversion project:
New chamber is reamed on a test barrel (I did not ream a barrel with .30 carbine chamber already in it).
TT33 mag fitted into a 15 rd M1 carbine mag body, shimmed and aligned to allow the bolt to clear the lips, but feed the TOK round.
Bolt face machined out to accept the slightly larger diameter of the TOK brass.
Dry cycled w/o extractor installed, to check to see for mis-feeds, no problems.
Next step to trim extractor, and dry cycle dummy TOK rounds. Then take to the range.
Plan is to make a 18.6 " Stainless steel barrel sleeved into a USGI gas block, like I make my std N/R barrels.