Tuning Increase in fps when dropping off regulator…
- By EPG
- PCP Airguns
- 9 Replies
I’ve got a HW110 .22 that I’ve tuned down.
It was originally “FAC” - about 29 ft/lbs with JSB 18.13g.
I dropped regulator pressure to 112 bar and replaced hammer spring shuttle with lighter UK spec shuttle.
I’m now getting well over 100 shots on a fill at 680-700 fps with 14.3g.
However, it seems to jump up about 20 fps when “falling” off the regulator.
I previously set regulator to 105 bar - and had same type of jump.
To get rifle to gradually drop velocity when falling off regulator, what adjustment(s) should I do?
-Ed
It was originally “FAC” - about 29 ft/lbs with JSB 18.13g.
I dropped regulator pressure to 112 bar and replaced hammer spring shuttle with lighter UK spec shuttle.
I’m now getting well over 100 shots on a fill at 680-700 fps with 14.3g.
However, it seems to jump up about 20 fps when “falling” off the regulator.
I previously set regulator to 105 bar - and had same type of jump.
To get rifle to gradually drop velocity when falling off regulator, what adjustment(s) should I do?
-Ed