what fps are u shooting with? Just put a huma reg in, set at 125 bar, Jsb 18.13gr is doing around 935 fps, thinking of lowering the reg to 120 bar, but i hate to hand pump 0-230 bar.
Fx wildcat .22 fps
- Thread starter Tobbe77
- Start date
How are your pellets grouping? I just put the Huma reg in my MKII set at 140. After going thru hammer spring adjustments, I ended up leaving it at 928 fps avg. with a 9 fps spread. My factory reg was shooting 875 fps with a 49 fps spread.
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Nerver tried accuracy, lowered setting to 120, started hand pumping again, coffey break now, soon som chrono testning, had really great accuracy with Fx reg at around 895 fps, but sometimes i had flyers, did some chrono and saw fps drop sometimes around 40 fps, and my first shot after sittning 10 min was around 60 fps lower and 2nd shot 30 fps, then 3rd shot was ok.
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Reg setting at 120 have me around 890 fps with Jsb heavy, gonna shoot some later to let the reg settle before i do a shot count and check fps spread.
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Btw, my wildcat is mk2 aswell, gonna send my Fx reg to Fx and let them fix it for me, then i keep it as a spare, or sell it.
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Hummm, now I've got to chrony my Wildcat mk1 again. I have mine, with Huma, set at 150, and I don't remember getting that high of FPS with the same pellets. If I recall, I was getting high 800's no 900's at all. Will retest later, I'm a lazy butt.
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Tried 123 bar on huma reg, only got 5 shots through chrono before the sun disapeared, after that i only got error on the display, the 5 shots with Jsb heavy was between 915-922 fps, some more testing tomorrow.
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Is it a bad thing to lower the fps from 920 to 900 with hammer spring, or is it better to lower reg setting?
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Kinda strange with the huma reg, with Fx i got 57 shots at 894 Avg fps, with huma i only got 35 shots with 885 Avg fps before fps started to drop
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That's kind of a tough one. It's better to lower with hammer and see how it groups. If you end up getting too loose with hammer, I'd lower the reg and tighten the hammer back up. Depends how close you are to the speed you want to shoot. I'd say for 20 fps, hammer all the way.
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I ended up at the 140 bar hammer spring turned OUT 3/4 of a turn pushing 18 grain pellets at 925 FPS .started at the 130 bar and couldn’t get past 880 fps
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If other folks are getting that at a lower reg setting . I'd check to see if the barrel port is lined up properly in the block. And bolt probe depth is set correctly. Both will affect your velocity.
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Rj I’m not complaining I’m good were I’m at.Im interested on there setting to get that FPS .accracy is a dime group at 50 yards.
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My Wildcat MK II is 0.25 but I have noted that well polished ST-X barrel like to shoot with higher muzzle velocity with a really good accuracy.
Now I have set the Huma regulator to 125bar and with correct hammer spring adjustment I get approx. 285ms ~ 935fps with JSB King 1,645g ~25,39 grain
Gun is like laser, stacking pellets from 46m ~50yards all day long. No flyers at all !
ST-X liner has been polished with JB bore finishing compound to almost mirror finish.
I have seen many times that some FX guns have flyers time to time and strange POI shifts. Almost 99% of the cases this is caused by lead build up in the bore.
Regular ST barrel was almost disaster if ST choke was not polished really well. Huge amounts of lead stuck in the choke just after hundreds of pellets fired. After polishing no lead build up even thousands of pellets fired and gun is groping extremely well.
Same applies to ST-X liner, bore need to be polished almost to mirror finish and then the magic happens, you have gun like a laser
Regards
Kime from Finland
Now I have set the Huma regulator to 125bar and with correct hammer spring adjustment I get approx. 285ms ~ 935fps with JSB King 1,645g ~25,39 grain
Gun is like laser, stacking pellets from 46m ~50yards all day long. No flyers at all !
ST-X liner has been polished with JB bore finishing compound to almost mirror finish.
I have seen many times that some FX guns have flyers time to time and strange POI shifts. Almost 99% of the cases this is caused by lead build up in the bore.
Regular ST barrel was almost disaster if ST choke was not polished really well. Huge amounts of lead stuck in the choke just after hundreds of pellets fired. After polishing no lead build up even thousands of pellets fired and gun is groping extremely well.
Same applies to ST-X liner, bore need to be polished almost to mirror finish and then the magic happens, you have gun like a laser
Regards
Kime from Finland
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Did some shooting in chrono, then pumped it to 230 bar, vent out for a smoke, When i came back i hear a hissing noise, leaking from reg breathe hole, out with reg and change the o-rings since i bought spares from huma, they are bigger then Fx o-rings (to bad since i have x10 Fx o-rings), changed bar setting to 122.
did 5 shots through chrono at around 908 fps with Jsb 18.13.
gonna try a shot count soon when i have hand pumped it to 230 bar.
Btw, anyone know the size of huma reg o-rings?
did 5 shots through chrono at around 908 fps with Jsb 18.13.
gonna try a shot count soon when i have hand pumped it to 230 bar.
Btw, anyone know the size of huma reg o-rings?
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