My post was supposed to say I DON’T get how a regulator causes the valve to release less air, but if I am understanding what your saying is…you may have your reg set to say 140 bar, but if your reg is not as good it my actually be allowing 145 bar into the plenum and because the plenum is at a higher pressure the valve releases more air than had the reg really been at 140. Is that the gist of it?
I suspect it's a little more than that, as if the regulator was consistently letting it go to 145 bar, you'd simply dial-down the regulator to get 140 consistently. Presumably what's happening is "creep" where the longer you keep the gun idle, the higher the pressure in the plenum gets, i.e. beyond the regulator setting. And beyond creep, there is also just less consistency, i.e. fluctuation shot to shot in plenum pressure.
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