I don't lock up my guns or my ammo... besides locking up my apartment. No one should be coming in here anyways... I live alone.
Thats why I said supposed to be... anyone illegally entering my apartment is doing so illegally. The owners/management also cannot legally enter, key or not, unless its an emergency. When they want in, they schedule it, and I am there.
I'm on a third floor I cannot get a heavy safe into. I also am not allowed to make changes like bolting something to the floor. If someone is breaking in to my apartment, any safe I actually could have could be stolen or broken into as well, meaning my guns are still gone... I don't see what I could do to change this. I'd need a very large heavy safe that they couldn't open, or get down the stairs easy enough to want to do it.
...they don't make gun safes big enough to hold my ammo.
...I have appliances in my basement that appear to be out of service that contain ammo. A freezer with a cargo strap holding door closed (Ohio requires unused refrigeration units be secured from child access) the ratchet mechanism is rusted and pinned so you can't just open it up, it is plugged in but that operates a dehumidifier rod. There is a gas range with the racks set to hold different levels for storage (gas is disconcerted for safety). There is a commercial milk cooler with cases up the back wall and scads of plastic containers on the shelves in front of them.