1911: I think you have to be careful with the surplus, especially if it is made or was made for submachine guns. If the add for the ammo specifies that it is for the 7.62 Tokarev pistol it should be ok, but a awful lot of that stuff was made for the sub guns and is too hot for pistols.
I would say that the most recent manufacture would be most likely to be at the pistol level of pressure but I am not aware of any Polish surplus - maybe there is. I would think the Yugo/Czech might be the best bet as I believe the newer manufacture S&B and PRVI are made there and their ammo is very good.
But, let us not forget our very own Ron Reed, who makes the best 7.62x25mm ammo this side of the big pond. I would (1) actively seek his advice and (2) most likely purchase from him. I know he has a bunch of different loadings for the Tokarev round and specific loadings for the CZ52 as well as the Tok. I know that if I was going to order from him I would ask that his loads at least duplicate the velocity of the S&B ammo but wear a hollowpoint or soft nose.
Speaking of Toks, any idea of where to get spare firing pins, springs and retaining pins?
? I have a young friend with a WWII bring back missing the firing pin, firing pin spring and firing pin retaining pin and he would like to put this pistol back in action if it is safe. I know we can get recoil springs and the like from Wolffe but nobody else I have seen lists the other parts. Thanks.