Shooting Lugers (Safety Issue)

I have a friend who has managed to break (shatter)a breech block in a pre-war (WWI) Luger, otherwise near mint (it hurts even writing about it), and also break a center toggle link in a 1917 DWM. I do not know nor have been unable to establish if very hot loaded ammo was a factor, but can tell you as a fact that both pistols were matched, excellent condition examples. While I agree that current condition is a major consideration, I have to say that IMO, I prefer and just feel a bit more secure in using a Mauser as my "shooter". I think that the metalurgy was a bit improved and the technology was at it's peak during the Mauser era. I think that spring replacement is a good idea in any shooter. I don't think that shooter saftey is a big or unusual issue with the Luger in general, but rather parts breakage and in that area I have to give at least a slight nod to Mauser.