I'm going to say you should probably get about 140-160 shots of of the 13ci/3000 tank. That's if you don't waste a bunch at the chrony first. You could probably gain a bit by using a tight bore and running your velocity a bit on the low side......say 270ish.
This is based on the numbers others have posted here.
CCI stock class Phantom pump f/s. This thing is LNIB. Comes with stock magazine, extended magazine, barrel detent kit, crossfire lite up dot sight, velocity adjustment tool, 12 tubes even the barrel blocker
Ninja grey 50/4500 paintball tank f/s. Hydro good until 2019
Old school angel poppets/cup seals(LCD and A4/speed), spring detents(not sure which models) F/S