That is directly dependant on the type of marker you're using, and just how trigger happy you really are... I've got a Spyder Pilot ACS, and when playing at either semi or 3-burst intervals, 500 paintballs usually last me an entire day, depending on the skill of the competition.
A 12oz tank will not last long on any gun. Most likely, you may get 400. 500 if the dwell is low.
It depends on the tank size. 9 oz: maybe a bag (500) 12oz: Half a case or a bit more (1000+)
it will probably last about 3 hoppers full of paintballs
at least 500
About 300 to 350 shots! :)
You must get them hydro tested every 5 years.
500 years.
500 years
It depends on the size of the cartridge and the efficiency of the gun and the outside temperature.
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It depends completely on the Paintball gun and how fast you fire it, if you keep it on between games, and the battery voltage and type. I would estimate a 9v in a tippman may last two straight days or so without firing.
About 3.5 hours