It's been discussed a billion times online, but curious about ingo opinions. I have a... ammo closet, we'll call it. Insulated to the outside wall and ceiling but also sealed from the house other than a couple walls backing up to climate controlled areas, on a slab. I'm considering installing ventilation and while challenging, think a hole in the wall with a register booster installed may help. That's being said, what humidity would you feel comfortable storing ammo at? I'm not interested in hearing about ammo cans, desiccant, etc because most is treated as such. The hypothetical question is, if you had loose ammo and gunpowder, what humidity level would you consider OK for long term storage?