Not exactly AR-15 specific, but this seemed like the closest fit.

I'm noticing a definite pattern. If I load up my Ruger 10/22 magazines -- I have a variety and they all seem to do it -- a while (maybe a week or two) before I plan to use them, then the ammo doesn't function.

I get constant fail-to-extract and fail-to-eject. Stovepipes. Rounds that won't chamber. Etc, etc, etc.

I see this both with 22LR and 22-short (Volquartsen kit).

Is this a known-issue?

Mike