You are the type of gun owner who takes safety seriously. This is really the only way to be. You understand the right to defend yourself and the pleasures of good hunting sport but you also know that there are dangers involved.
While you could easily store your ammo and guns in the same safe, it is generally considered to be poor practice. You should have a separate storage safe for your weapons and an ammo storage safe. Moreover, you should definitely have a safe either way and never keep either in unlocked locations.
It is best that guns be kept unloaded and separate from ammo until they are going to be used. This way, there is no possibility of either one being dangerous. It is the combination of the two that really pack the lethal punch.
No Prying Fingers
The best thing about good ammo and gun safes is that they keep everything secure from prying fingers. The most concerning of these would be the fingers and hands of your kids or other young visitors to the home.
It is important to make sure that even your kids know about gun safety but that does not mean you can keep weapons and ammo out in the open. Maintain the highest level of safety with good safes.
Peace of Mind
When you have a good safe for your weapons and one for your ammo, you know that both are going to not only be safe from the kids but also from home invaders of any kind. Part of the reason you own guns is for self defense so it would be a contradiction if others could get to your weapons before you.
This is why the best gun and ammo safes give you the peace of mind to own all the weapons you wish to own.