Apologies for bringing up an oldie, but a great ttuning thread imo.
I have a thought for conversation...,My .22 zelos likes 870 fps for the 18.13 pellets. I have gotten there bumping up the reg, and backing off he h.s., and vice versa with the same group sizes. What are your thoughts.
My set up with...
1. Higher reg psi, and less hammer spring feels ,and sounds sluggish compared to...
2. Lower reg. and up the hammer spring? Seems snappiier, and quiet.
let's leave shot count, sd and es at the proverbial door for now. I am more interested in finding if your rig groups better with a higher reg.?, or more H.S. Tension to get to the same fps?
Thanks for your ideas....
Gerry