I have a very early Kalibrgun Cricket .22 and need some suggestions on increasing power and I'm hoping one of the old timers here can help.
Installed a Hum Reg and set it at 125 bar, about 6 months ago. I also reduced the force of the spring on the firing valve (so the hammer should not need to hit too hard).
The gun is very consistent, accurate, and efficient with air - but only shoots at a max of about 774 fps with JSB 18.1's (24fpe). I get 774 fps with the stock plastic hammer spring screw all the way in. If I screw it out about 4 turns, the gun shoots at about 755 fps.
I'm hoping to get it to ~ 880 fps. My first thought was to get an adjustable HST, to compress the spring more. However, trying to analyze this, it may not help because I think the current hammer spring must be opening the valve sufficiently. I'm assuming this because the gun is very consistent (about a 6 fps spread from low to high over a 15 shot string), and the valve spring is set softly.
Now I'm thinking that I probably will need to open it up and crank the reg up to ~ 140 bar ??? Which, I'm reluctant to do as I'm a pumper (and though I don't like to admit it, an old fart). Also, before putting the Huma in I had struggled with a leak for years so I'm a little hesitant to open it again. But I will open it up and adjust the reg if needed.
Please will you give me your suggestions.
Installed a Hum Reg and set it at 125 bar, about 6 months ago. I also reduced the force of the spring on the firing valve (so the hammer should not need to hit too hard).
The gun is very consistent, accurate, and efficient with air - but only shoots at a max of about 774 fps with JSB 18.1's (24fpe). I get 774 fps with the stock plastic hammer spring screw all the way in. If I screw it out about 4 turns, the gun shoots at about 755 fps.
I'm hoping to get it to ~ 880 fps. My first thought was to get an adjustable HST, to compress the spring more. However, trying to analyze this, it may not help because I think the current hammer spring must be opening the valve sufficiently. I'm assuming this because the gun is very consistent (about a 6 fps spread from low to high over a 15 shot string), and the valve spring is set softly.
Now I'm thinking that I probably will need to open it up and crank the reg up to ~ 140 bar ??? Which, I'm reluctant to do as I'm a pumper (and though I don't like to admit it, an old fart). Also, before putting the Huma in I had struggled with a leak for years so I'm a little hesitant to open it again. But I will open it up and adjust the reg if needed.
Please will you give me your suggestions.
