Re: How long do you expect a rifles magazine to
Agree that you need to have go to mags, that is a great idea. I have go to mags that I carry but have found that they still require inspection and a test fire from time to time. I always run the original load through the gun and a follow on loading. I have found that the follow on load will sometimes fail. I'm not sure why but it has happened more times than I care to remember. Also, when loading from a stripper clip with a speed loader, sometimes the rounds don't sit right inside the mag. I guess it's the violent nature of using a speed loader. You can tell if it rattles a little. Best to unload and load by hand. I have used most good mags; C-Products, Magpul, H&K, Lancer (maybe good?). They all have failed due to the speed loader. I find that the springs inside H&K mags suck and tend to wear out quicker than C-products (issued) mags. The H&K body is awesome, but cumbersome. I tried P-mags, but they would make me insane trying to put them in and pull them out of my kit. The ridges would catch on everything. I also had a couple really weird failures with them, the rounds would cross like an X. I had never seen that before. I now carry C-products mags with Magpul followers and some brownell's springs. They work great, but are disposable none the less. The good thing about that, for me, is I can get new issued mags if they wear out and swap followers. I have not used the Lancer mags long enough to comment. Their durability seems questionable, as the rubber bumper on all my Lancers is tearing off from transport in a bag.
I have no idea how many loading/unloading cycles the average mag takes to fail. I shoot about 25000 rounds a year, if it's a good year. I replace all my mags about every 7 months. Lately, that has been due to new mags coming to light. Normally, I would just replace the springs if the body was in good shape.
Once they shit the bed, crush (or fix and test) them and don't look back. It was said here once, a mag is not worth your life.