All my primers are stored (inside the original boxes), in G.I. Ammo boxes...they have a rubber seal. I have a very large metal ammo box in the unheated garage (Michigan), that I have kept my iron bullet molds in for years without oiling them. I put some Vapor Inhibiting Powder (VIP), powder in the bottom of the ammo box and keep the lid closed except for taking out a mold or putting one back in. There is absolutely no rust on any of my molds.
Sometimes you get what you pay for, sometimes you only pay more for what you get.
Three shots are not a "group"...they are a "few".
If the Bible is the literal, infallible, unerring word of God...where are all those witches I am supposed to kill?