Just a bit of a heads up guys. In order to make a TT33 work well with a 9 mm barrel, you need to get a main spring out of a Norc 201 or 213.
The Tokarev spring is just a bit too stiff for the charge in the average 9mm cartridge to cycle the slide properly. Even when I put the gun butt firm against a block of wood, the 9 mm would dribble out of the ejection port 5 times out of 10, and and usually get jammed in the port when the slide returns.
So, unless you have a Tok with a weak spring, or have a spring out of the guns mentioned above...you will not be happy with a simple barrel conversion.
Also, there are two types of magazines for the 9mm Tokarev. There is the narrow magazine that fits the magwell of the M-213. Then there is a regular size Tok magazine, with a modified slide plate and a u shaped spacer running down the inside of the magazine the holds the 9 mm rounds forward. It is interesting to note that the M-213 has a similar shaped spacer in the magwell to accommodate the narrow magazines. I have pulled the spacer out of the magwell of the 213, and the regular Tokarev mags fit.
So, if you are out there looking for this conversion, you now have a bit more information to make this project a success.