I have kept Wilsons loaded for months with no weakening of the springs.
Keeping a load (compressed) on a magazine springs doesn't weaken them. Loading and unloading them does
Keeping a load (compressed) on a magazine springs doesn't weaken them. Loading and unloading them does
in my experience, neither will keep spring tension more than a few months when kept loaded. i use metalform 7 round skirted follower flush-fit mags in my carry gun, (or Ed Brown, same thing) and Tripp Research cobra mags for 8-rounders.
nothing else stacks up, although most 7 -rounders are "ok," and i don't like trying to change mag springs frequently just to get reliable function.