If you use up 2000 rounds in battle and you are still alive the bad guys are really bad shots. 2000 rounds is a good number to use for your rifle. It is a good policy to have a second rifle in the same caliber in case of failure in your primary rifle.
In the selection of a rifle stick to calibers that are common as there is much more ammo available for these. I would suggest the 30:06, .223, and the .308. All of those are military rounds and there is a lot of that ammo out there. If you can afford it buy two rifles in each caliber and sufficient ammo for them.
500 rounds of hand gun ammo is sufficient. I keep more but I shoot a lot. Stick to common calibers i.e. 45CP, 9mm.
When I shoot I replace it with a like amount of new ammo.
There is quite a bit of corrosive ammo out there that is not bad stuff and is cheap. It shoots well and if it has been stored in a spam can it will be good. However, CLEAN YOUR WEAPON after using it and you will not have a problem
LOL
It don't work that way.
500 rounds of hand gun ammo is sufficient.
...for a day’s practice.
The point to having LOTS is to be able to TRAIN, without with ammo is nearly useless.