Alright, I figured it out.
(42) is the actual adjustment that requires a 4mm hex key. Would've been a heck of a lot easier if they designed the tube to reg housing transfer port (22) to be 4mm instead of 3mm so that you didn't have to remove it to make minor adjustments.
Degas the airgun & disconnect the tube fitting
If you don't have the correct spanner wrench, protect the threads and use some needle nose pliers
Remove (22)
Mark your original setting
Turn CC to increase reg pressure. Note that the nut (75) is held in place by the tension from (42) and the pressure from (22). I suggest carefully holding the nut while making the adjustment and then making sure its snug.
Initially I increased the reg pressure too much (780 fps to 880 fps) so I had to go back & decrease the pressure (hence the clockwise mark)
Finding the harmonious point of an airgun is always a balancing act. Typically I find my airguns to be most harmonious when they are driven by the regulator pressure. By that I mean the regulator has slightly more influence on the shot than the hammer (and the hammer isn't hitting or bouncing) silly hard to open the valve.
My target velocity is 830 fps with .22 JSB 18g pellets (to match my Colibri & Leshiy).
This string was an average of 14 fps hotter than I'd like, but when I decreased the HST it was a little out of balance (to the ear). The reg pressure vs the HST is spot on because after the 70th shot it drops about 10 fps per shot.
Perhaps someday I'll find the time to reduce the regulator pressure just a hair. But for the time being I'm pretty happy with 70 shots @ 844 fps (28.5 FPE) on a 275b fill. Realistically I'll normally fill to about 250b, which I think was about 12 less shots.
*A few things to note:
Best,
-Michael
(42) is the actual adjustment that requires a 4mm hex key. Would've been a heck of a lot easier if they designed the tube to reg housing transfer port (22) to be 4mm instead of 3mm so that you didn't have to remove it to make minor adjustments.
Degas the airgun & disconnect the tube fitting
If you don't have the correct spanner wrench, protect the threads and use some needle nose pliers
Remove (22)
Mark your original setting
Turn CC to increase reg pressure. Note that the nut (75) is held in place by the tension from (42) and the pressure from (22). I suggest carefully holding the nut while making the adjustment and then making sure its snug.
Initially I increased the reg pressure too much (780 fps to 880 fps) so I had to go back & decrease the pressure (hence the clockwise mark)
Finding the harmonious point of an airgun is always a balancing act. Typically I find my airguns to be most harmonious when they are driven by the regulator pressure. By that I mean the regulator has slightly more influence on the shot than the hammer (and the hammer isn't hitting or bouncing) silly hard to open the valve.
My target velocity is 830 fps with .22 JSB 18g pellets (to match my Colibri & Leshiy).
This string was an average of 14 fps hotter than I'd like, but when I decreased the HST it was a little out of balance (to the ear). The reg pressure vs the HST is spot on because after the 70th shot it drops about 10 fps per shot.
Perhaps someday I'll find the time to reduce the regulator pressure just a hair. But for the time being I'm pretty happy with 70 shots @ 844 fps (28.5 FPE) on a 275b fill. Realistically I'll normally fill to about 250b, which I think was about 12 less shots.
*A few things to note:
- It took full bottle pressure fills to properly seat the regulator adjustment (I was testing velocities at < 175b and getting false results)
- Make sure you tighten the HST grub screw after each adjustment as it will affect your velocity as well
Best,
-Michael
Upvote 0
