Between my wife and my 11 month old son I rarley get all the way done with a batch of reloads. I usally just take the primmed cases and put them back in the brass bag which has a zip-lock top on it. These are stored inside the house in my blast cabinet. I have yet to have any problem with FTF. I think as long as the humidity is kept to a minimum you should not have a problem. If you still want to pop the primmers out I would pop the cap in my rifle before going to the bench. Keep the muzzle pointed in a safe direction as if you had a live round.