Will last a lifetime - MTM 100 Round 44 Magnum/45 Long Colt Blue Pistol Ammo Box

If you use these to protect your reloads you'll be handing these down to your great grandchildren. Everything can be destroyed I suppose with the right hammer but on all seriousness I think under normal use these are bullet proof cases. I own them for every caliber o reload for and wouldn't use anything else.