reiver, I'm not sure how to answer your questions. The toggle train is secured to the receiver via an axel pin which initially absorbs the energy of the recoil until the toggles break and the action opens. They can and will break. A cartridge with too much pressure can also damage the breechblock. A ruptured primer can blow out the firing pin and keeper while a ruptured case can cause damage to various parts including the magazine.
The newest military Lugers are 80 years old and some are as much as 114 years old - counting only the P.08 and not earlier models. Shooting +P and other high pressure loads in them is like shooting .38 Super in the Astra 400/Model 1921 pistols. They'll take it for awhile... until they fail. The wisest course of action is to only feed them standard pressure cartridges.
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