BritinBritain
Per Ardua Ad Astra
Best I recall there was some way they knew witch round was for, been too long to remember, but the MP-40 round was supposed to be a lot hotter & too hot for the P-08. Haven't seen any comparisons to the Mk2Z. Along the same lines of not using PPSH ammo in your Broomhandle.
The Germans made two types of 9mm Parabellum ammunition?
If you ever see British Mk2Z on the market, give it a wide berth, its evil stuff. Exactly like using 7.62X17 in the Broomhqandle.