Those of you that have a .25 FX Crown what PSI regulator pressure setting do you recommend? I am shooting the JSB Diablo Heavy Kings. Thanks
FX Crown .25 Regulator Setting?
- Thread starter Lmctex
- Start date
Mine is set at 130 bar with power wheel set to 5 averaging 885fps and I've gotten down to 3/16" @ 52.3 yards (measured with a 200' tape measure) with "25.39" JSB king diabolo's visually inspected then sorted to fall within 25.30 and 25.69 grains. I havn't tried the heavies yet. My shooting is rusty but improving : )
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Step one, max out the HST by turning the allen screw on the side.
Step two, turn set the reg at 140bar.
Step three, set the power wheel to 5
This should get you very close to the FPS that you want to be at with the heavies.
Step two, turn set the reg at 140bar.
Step three, set the power wheel to 5
This should get you very close to the FPS that you want to be at with the heavies.
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145 bar , max power wheel , avg 879 with king heavy mk2 . Still need to find tune the Hammer spring I think .
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If I'm shooting the 25.4 I back of the reg to 130 PL5 that's mid 880's.
KH I go up to 140 PL5 mid 850's. No POI change at 50 yards this way.
These guns are all a bit different but close. I Sat down one afternoon a while back
Took the stock off then put the PW and safety back on and played with all the settings.
Mine does not like the HST tight up against the cam on the PW set to max for instance.
I lost velocity on PL 5 and max. In backing it off just a little I got more consistent velocity
gains from 4 through max and PL3 is of use as well. It's only going develop so much power.
I wanted mine on max to get that not 4 or 5. That's how mine works any way.
Dennis
KH I go up to 140 PL5 mid 850's. No POI change at 50 yards this way.
These guns are all a bit different but close. I Sat down one afternoon a while back
Took the stock off then put the PW and safety back on and played with all the settings.
Mine does not like the HST tight up against the cam on the PW set to max for instance.
I lost velocity on PL 5 and max. In backing it off just a little I got more consistent velocity
gains from 4 through max and PL3 is of use as well. It's only going develop so much power.
I wanted mine on max to get that not 4 or 5. That's how mine works any way.
Dennis
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Thanks to all for your informative responses! I now feel confident that I will win Extreme Benchrest this fall! ??
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Dennis and others
Hi
Good info. When you backed off the HST against the cam how any turns please? Better still is there a measurement available? Maestro Ted did the same thing on his Crown review and found the harmony. Which we all seek. Assume you have noticed a sound difference too?
Safe shooting
Hi
Good info. When you backed off the HST against the cam how any turns please? Better still is there a measurement available? Maestro Ted did the same thing on his Crown review and found the harmony. Which we all seek. Assume you have noticed a sound difference too?
Safe shooting
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The only way to do this properly is by using a chronograph while shooting the gun and adjusting the screw. There is a point where the velocity won't increase anymore whilst turning in the allen screw, that's the point you're looking for.
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Hi Broekzwans
Thanks, but not how others did it, difficult to fire without stock on.
Sure somebody else quoted distance of gap .
safe shooting
Thanks, but not how others did it, difficult to fire without stock on.
Sure somebody else quoted distance of gap .
safe shooting
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That is indeed a way to do it but it is the rough way to do it.
That method goes as follows: If you remove the stock and look at the tiny peep-hole under the magazine port you can see the valve stem. Place the gun barrel up (so pointing straight up to the sky) and turn the allen screw in until you can see the tip of the hammer through that hole. If you do this your close to being maxed out.
However, using a chronograph you can find the exact point at where the HST is at the max and therefore it is the better way to do it.
Firing the gun without a stock is easy but not as comfortable as with the stock
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@Broekzwans
You are correct in this method, as was also explained in great detail by Weatherby, When I did this? I could not see the hammer. I may mess with it again because I can LOL.
You are correct in this method, as was also explained in great detail by Weatherby, When I did this? I could not see the hammer. I may mess with it again because I can LOL.
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Had rifle for two weeks. Shot one time. Regulator won’t adjust either way (yes I removed the bottle and bled all the air out before adjusting down). Being sent to FX tomorrow for warranty service. ???
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Sorry to hear your having trouble Lmctex.
I may have to revisit my settings with the chrony. I was out the last three days practicing at 100 with the KH 140bar setting 5. Range card says 15 MOA @ 847 FPS.
I had to go to 14 MOA, So I have to be closer to 860.
I may have to revisit my settings with the chrony. I was out the last three days practicing at 100 with the KH 140bar setting 5. Range card says 15 MOA @ 847 FPS.
I had to go to 14 MOA, So I have to be closer to 860.
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