Many people are storing large quantities of ammunition for various purposes. Some shoot a lot like I do and stock up when they find a good deal. Others store large quantities for long term purposes. There are some things to consider when storing large quantities of ammunition.
As a small arms instructor and range safety officer, I frequently see AR platform rifles lock up using steel cased ammo. Many think it is due to lacquer on the case to prevent rusting gumming up a hot chamber. But is that really the reason? And will steel cased ammo really damage your AR?
The handgun is in reality a poor defensive weapon compared to a rifle or shotgun. But it has the advantage of being lightweight, portable, concealable, and probably more likely to be on you when you need it.