I am pretty new to pcp and there is a lot to learn. I have not uncovered the tip of the iceberg.
Well see, that is part of the adjustment. Yesterday I was trying diff pellets in one of mine. I was shooting 13.43 grains at 935 fps. Smokin….i backed off the hammer spring tension a little bit and that brought the speed down closer to 900 and the accuracy improved. Most of the time pellets like to be just under 900 to get good accuracy.
Your gun is unregulated so the pressure you fill to will matter.
Example:
My Mrod has a max fill of 3,000 psi. But the sweet spot starts about 2,600. If I fill to 3,000, it’s too much pressure for the hammer to keep the valve open long enough for a full power shot. So shooting from 3k to 26 k is a waste of pellets as the are too slow for the scope adjustment set at higher speeds. So I fill to 2,600 and shoot down to 2,100 or so. That keeps things consistent.
I don’t know where yours will work best.
So if you see that it’s shooting those Crosmans say 950 or so, you my want to back off the hammer spring to bring the speed down closer to where it may be more accurate.
It is a balance between fill pressure and how hard the hammer hits the valve. Hence the China device to tell you what is happenin.