This ammunition has some other issues as well:
Bullet type that can cause more wear to the barrel and that is outlawed on most firing ranges because of the steel core. (mE = Steel jacketed steel core. SE = Sintered Iron bullet).
Corrosion due to bad storage can take place on the INSIDE of the steel case. This may weaken the case (and spoil the load).
The German army limited the use of laquered steel cases in the P08. The P08 has a gas seal ring in the chamber that works great with brass cases, but can cause steel cases to jam. Late WW2 ammo crates carried a warning label for this.
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