It completely depends on how many people I am playing against.

If it's an Outlaw game with 3-4 players on each team I will use probably use 11-30 or 31-50 depends on how many times I need to flank or suppressive fire someone.

If it's a bigger game with 13+ people per team I could use up to 100 paintballs depending on what position I play; commander, saber, sniper...

Average game though I'm going to say... no more than 30.

__________________