x-valve and preset tank

[Autosnipe]

I read in a few places that a preset tank putting out 800-850 psi isn't enough and I should get an adjustable and have it at 900 psi. Is there any truth to this? Thanks!!

[alooney11]

Nah mags will fire at lower pressures even down to 650 psi. It just makes it tear when you use an adjustable tank and put like 1000+ psi going into it.