Anticipating the test firing last year of a project gun, an 1896 Bolo Mauser, I bought 500 rounds of new made PPU 7.63 Mauser. It took until today to get it to the point where it was ready to shoot and after 3 rounds of the stuff I'm going to have to stop. The primers, while not backing out at all, are quite cratered with the crater part ballooned out as well. High pressure it seems. I had one stripper full of older US made ammo, Western and Rem Umc. Shot one of those and the primer looked like it should. This pistol has a new reline including chamber which was made from a piece of stainless 30-06 rifle barrel. Ejection is vigorous enough. I am going to contact the seller if I can remember who I bought it from. Then again maybe not and just shoot it in the Tokarev. Anybody ever hear of high pressure ammo from this maker before?