Ya, longer dwell makes you quieter, but also uses more air.
Each time you change your dwell, you should readjust your regs as well.
If you want the smoothest shot possible, then you'll also want to run your LPR as low as possible. Just set your velocity, then turn your LPR down until it's at the lowest setting it can run at consistently under rapid fire.
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