I was just about to ask the same thing. Kinda
I noted that Tulammo offers a 124gr JHP. The 8M3 bullet is 124grs. and as far as I know, its the only 124gr JHP for 7.62x39. I also noted that this round is loaded by Ulyanovsk Cartridge Works.
I found two boxes of Sapsan 124gr 8M3 JHP (in the blue and white box) and compared them to the Tulammo branded stuff.
The bullets look identical from the outside. The lead core is the same depth from the mouth of the jacket on both bullets
The only visual differences I see deal with the casings. The Sapsan has UMP's crossed arrows headstamp, while the Tulammo has some other kind. The Sapsan has the old lacquers coated casings (green), while the Tulammo has polymer (gray)
I have found the 124gr JHP loaded by Tulammo at Bass Pro, Cabelas, and Academy. They seem to be available in large quantities..