Hi Illusion,
I do not know exactly on what depends, I tried with marui magazines and and nothing changes.
I put the complete slider on a body hi-capa and consumption is similar to the original installed.
I guess it depends on the gas I use, in Italy the greengas come to 8.5 bar at best, and I do not know propane.
Other idea is the wheater now we have 15-20°
All moving parts have a mass of 125 grams
This is the gun with the new plug, for use springs of different tests