Do Luger Parts Wear Out And Need Replaceing

[kurusu]

Originally Posted by Dwight Gruber

See the second stickied discussion in this forum.

--Dwight

This is my own 20 year survey of about 20 to 30 Lugers used in target competition 70 rounds per event 2 to 3 events a year.

I forgot to mention 4 failures of the rear toggle link because the parts didn’t actually broke but developed cracks and would break if continued to be used.

Originally Posted by Karl

I used to always replace the mainspring in a new (to me) Luger because it is a cheap part and I reasoned that there was no harm in replacing the spring but potential harm in shooting with a weak spring. However, now that I reload and have more experience with lugers I have learned that the old springs, despite the age, are usually just fine. Coil springs seem to keep their vigor better than leaf springs. Can anyone here with real engineering knowledge support this opinion?
KFS

No engineering knowledge but, The luger mainspring is almost at no tension when at rest.