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Old January 13, 2013, 09:49 PM   #17
Onward Allusion
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Join Date: November 17, 2009
Location: IN
Posts: 1,799
There's 2 primary schools of thoughts on this. Some will swap their mags religiously, whereas, others will leave the same mag fully loaded in their HD gun for a year or more.

I personally down-load the mag by two for the nightstand gun and leave it in there for a year at a time.

The primary cause of magazine spring fatigue is the compression and decompression cycle. HOWEVER, leaving a loaded mag in a fully compressed state for months/years at a time DOES weaken the spring. If anyone doesn't believe me, load a mag and leave it the fully loaded state for a couple of months, then compare it to one that you'd fully loaded last week. There is a measurable difference in pressure. Is that pressure enough to make your pistol malfunction?
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