Worc, I understand where you're coming from. And it used to be a common practice. However, I've talked to metallurgists (sp?) and they all agreed that springs will not weaken over time if left fully compressed. They only weaken when "worked". In other words, compressed and decompressed many times. Shooting the mags will weaken the springs 5 times faster than leaving them compressed over several years, according to them.

Just wanted to give you some information so you can make an informed decision.