I’d like to chime in with my experience on [sealing ammunition primers–a topic raised by Teddy Jacobson.] If you’re looking for a sure fire way to protect your ammo under the worst possible conditions, you can’t do better than George and Roy’s Primer Sealant. The sealant is nitrocellulose based (the same as military and commercial ammo makers use), rather than lacquer based.
I was a distributor of the sealant for a number of years and part of our sales pitch was that if you sealed your bullets with George and Roy’s, you could throw the ammo in a bucket of water for a week and it would emerge unscathed. Well, a customer was the range officer at a Florida police department. He sealed 50 rounds with the product, then dumped them into a bucket full of WD-40 and left them there for a week. When he later tested them, he had 100% go bang. It doesn’t get any better than that. Regards, – Hawgtax