A thousand rounds is not that much. A standard box has 50 rounds, if you fire four boxes in a weekend, you can easily go through a thousand rounds over a month.

Now at $.25-.$30 / round, this does add up to an expensive hobby.

It really depends on the weapon / type.

I’d estimate I have shot over 100K rounds of 7.62 thanks to a good amount of time as an M60/M240 Gunner