08-25-2016, 04:54 AM
My experience with Blackout is that you need a minimum of 4,500lbs of pressure at the port to cycle an action. An action that uses a FMC and MILSPEC buffer/spring. That is 4.5K lbs indicated by Quickload. Add another 2K for reliability and gas leakage and anything more is surplus; to be either tolerated or tamed.
According to the simulation Grendel pressures with typical loads don't drop to below 6.5K until 26" of barrel-length. As long as you can sort out any dwell-time issues then there is plenty of gas to cycle actions using long gas tubes.
According to the simulation Grendel pressures with typical loads don't drop to below 6.5K until 26" of barrel-length. As long as you can sort out any dwell-time issues then there is plenty of gas to cycle actions using long gas tubes.