I was taking care of a farm in Zanesville and we did a lot of plinking around the farm, ammo quickly became a commodity.

So we were able to go to the local Wally World and they had the Winchester USA/Whitebox 40 round  boxes for 8 bucks. I picked up 2 boxes and after wading through a couple creeks I forgot about the Winny ammo which had been submerged for more then an hour. I slapped a mag and proceeded to light up the creek bank with zero failures.

Just letting everyone know that
Water+Winny ammo= No problems

Yep. And it sure isn't gonna be affected by moisture while sealed in an airtight ammo can. Stored properly this stuff will last for years and years. That's why I no longer care if XM193 is sealed or not. I have never had any moisture related problems with ammo anyway.

-Charging Handle