I decided to try and see what Id get by only changing fill pressure and not tweeking the factory settings.
For the .177 my chrony testing has me using 10.5g CPs filled to 2300psi. I get a good 30 shots with minimal POI drop and zerod at 30 yards.
Buy a chrony use it to test for best set up find the set up use the set up sell the chrony.
You can find set up info at the Crosman Croswords blog.