Good/Properly made springs do not wear out under load. They wear out from compression and decompression (AKA, being USED). A Mag thats topped off for 40 years will not make a spring fail unless extreme heat, extreme cold, or corrosion become a factor.
I do, but a guy with a lot of experience was telling me not to for the fact that it will wear the spring out.
First time I've heard that, not saying he's wrong, just that I've never heard it
This must have been the case in my scenario because the ones in my safe at home never do that.
Good/Properly made springs do not wear out under load. They wear out from compression and decompression (AKA, being USED). A Mag thats topped off for 40 years will not make a spring fail unless extreme heat, extreme cold, or corrosion become a factor.
The spring may take a set after being loaded to max, but that in the design paramaters of the springs when they are developed and manufactured.