Folks used to do it in the good ol' days. If they don't get wet, they're probably OK. Heard of some folks shooting charges that were loaded for 50 or more years, but I don't think I would chance the cylinder not being almost rusted through from the inside.... Be careful with a capped gun, load only five, hammer on the empty chamber and put a BIG SIGN on it so you don't kill someone next month. If a Remington, pull the cylinder out, if capped, be VERY careful putting it back in. Heard that Wild Bill Hockock fired his Navies empty every day, cleaned and reloaded for the new day, fresh and ready, didn't help him in the end, though. If the gun is capped, it would be dangerous to try to uncap it, and I wouldn't store it that way, or even put it in my car to take home that way. If uncapped, and not likely to get rained on, maybe OK.