Insofar as wear and tear is concerned, a Luger will want pretty much the standard load. It's an urban myth that they require a "stout" load. A load that is too hot will tend to be hard on the toggles.
The real question is how the ammo will feed through the magazine. If it's hardball, the overall length is the important point. If hollow point, where the edge of the holloow point rests on the front of the magazine. The idea is that the bullet nose should rest on the front of the magazine in such a way that there is a little daylight between one case mouth and the next. (You can see this sort of effect with most 22 LR magazines.) If a hollow point, the edge of the hollow should not drag.
All this becomes a problem only because some where along the way somebody decided 9 mm ammo should be shorter than Georg Luger intended it to be.
The Winchester white box 100 pack mentioned above is a good cheap hardball load.
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