Yes. I used a standard 25/64 inch straight chucking reamer to make my 9x19mm Luger chambers. The reamer was not tapered nor did it have a pilot nose. It works well. No rougher is needed either. A lathe IS needed to ream the barrel properly.
I have done the same thing with a 31/64 inch straight chucking reamer (.481 inch or about 12.22 mm) to cut .45 ACP chambers. Granted there is supposed to be a tiny chamber taper of about 1/10mm in the .45 ACP but it doesn't affect the proper sealing of the gas pressure in the breach.
A taper to the reamers would be nice but is not mandatory.
Back to the 7.62x25 Tokarev... Since this is a bottleneck type cartridge a rougher is needed to remove the extra meat from the barrel. A new drill bit (NIB even) can rough cut a chamber IN A LATHE. A bit with a useful tip angle could likely carve the bottleneck shoulder taper which is about 33 degrees included angle. I would not hand grind this angle on a bit. The hand ground tip will NOT track properly into a barrel blank !!! Do this job on a tool and cutter grinder - carefully.