On a related, yet still-off-topic note, I wonder if this is part of the reason that many brakes like the BC, AFAB mini, GA Flash Comp II, MAMS, etc. all have been reported as having a sharper recoil impulse? Possibly due to increased rearward BCG velocity from the added dwell time and gas volume afforded by what is apparently tantamount to an expansion chamber in each of these devices?