I strongly think anymore then ~1.5K worth of rounds for the day is a bit excessive unless there is hundreds and hundreds of people attending said event.
I personally go through 8-900 or less throughout the day. I run 10 mags at 100 rounds a piece for my AK, works perfect for me.
It only takes 1 shot to out your target unless they refuse to call their hits. If they shoot at you first, fire back and if you can't hit them - move up.
Like wise, you see them first and decide to shoot to only realize you cannot hit them - move up.
Don't waste rounds trying to hit them when you can't.