Mec-gar mag question.
 

Are the MEC-GAR P08 mag springs tempered as in to be able keep loaded for a long time?

Mec-Gar springs
 

The new ones seem to be??... I have done some brief test on them, and they seem to take little set, and hold up well.... Only the new type mags with plastic followers are in this category... They are the very best Luger mags ever made.... My upgrades add little, except for looks and maybe a slightly better spring?.... The Mec-Gar mags are a shooters dream, and a collectors nightmare.... Can't have everything!.. best to all, til...lat'r...GT:cheers:

Any mag or mag spring can be kept loaded for decades. The belief that springs loose their strength if kept compressed is an old wives tale.

I have wondered about this same question. On the FXO mag I just had GT work on, the spring was too weak to feed the bullets. Other then that, it was in good shape. What happened?
Here is a interesting article about this issue from a physics point of view
https://www.physicsforums.com/thread...spring.661309/
Based on this article,perhaps the material used on that mag spring was sub par(late war production issues?) or it was exposed to heat?
Bob

What wears out springs whether it be recoil, mag, etc. is usage. The compression and then the release of tension is what "works" the metal and allows it to lose it's properties. Now, if the spring steel was of poor quality to begin with, it will go downhill quick.