[jimustanguitar]

I would be more worried about the rounds than the spring in the mag also. My brother unloads his expensive wolf ammo to go shooting with cheap fiocchi every weekend and reloads the same 14 wolf rounds in his P99 mag every week. I would shoot them off and replace them personally, but he insists that they are fine.

I believe that rounds that stay in a mag are fine over a long period of time, but not if you are loading and unloading the same ones constantly.

I've got two mags of hornady that i'm keepin around, but I also have two other mags to take to the range. I'll probably cycle them through every couple months and replace them, but without carrying, I don't think any wear or damage will result of it.

Mag springs are cheap anyway. My followers show wear before my springs do.