Home Forums Hunting & Shooting Ask The Gunwriters Shotgun reloading pressure versus velocity question for the experts.

I put this same question in the shotgun reloading and see what kind of answers I get but this might be a better place it does involve a bit of scientific level I guess.

I'll see if I can get this question out, in a nutshell does the pressure affect the cycling of a gas or inertia shotgun?
What brings this question I have one gas operated 20 gauge that is a bit ammo finicky on new factory ammo. Ammo of the same weight charge and velocity rating some cycles better than others. Is that because of possible pressure?
When hand loading you can pick a powder that has some incredibly high velocity in lower pressure or you can give some faster burning powder that gives you a lower velocity on higher pressures. That's where my question of does the pressure really affect the cycling of an auto loader.