The point i'm trying to make : is it really so much better than a low end gun?
You mention the "sweet spot" - yes most airguns have a power curve as they are unregulated. Regulators were designed to give a sweet spot over most of the charge using a higher fill pressure to allow more shots per fill.
The point of my post was to see if the op's rifle with all of its tweaks and top notch regulator and large reservoir is more consistant than a low end knock open firing valve gun.....
Charlts i think you are getting carried away with how many shots you get from a fill
Daz