[campbed]

Cycle however often it makes you "feel" happy.

Doing it once a month seems silly, given the ammo in question has lived longer than that surely just getting into your hands.

One could look at all the examples of WWII and Korean War surplus ammo that runs like a champ.

My personal experience was with Winchester 22lr ammo left in our New England unheated garage for 20+ years. 1 fail to fire out of 50. That could have been the result 20 years ago too, who knows.

Replacing every 1,2,3,4, or 5 years seems reasonable.

I do so about every 1 year, but only with rounds that have been rotating through my magazines.

DATA: is there any?
If the military has a "issue by" date on ammo like 9mm or 5.56, that would be a great guide to go by. Does anyone know if there is such a thing? I've read that they were issuing ammunition in theater from the late 1960's during the Gulf War.