25 fx streamline/huma regulator

[ohio_hunter]

I just switched out the fx reg for a huma reg,the fx reg was set at the 140 bar and the newly installed huma is set at 148 bar...the rifle had shot 33.9 pellets at 849-860fps for 30 shots with the fx reg at 140.now with the huma reg at 148 bar what shot count and speed/shot count should I expect with hammer spring set at same place shooting the 33.9 pellets?I hope to get time to shoot it this weekend...

 

[tor47]

Well you will only know for sure when you test it. My guess is you will get quiet a few more shot, as the gun will shoot slower than before.

 

[ohio_hunter]

Well you will only know for sure when you test it. My guess is you will get quiet a few more shot, as the gun will shoot slower than before.

I thought just the opposite,a higher regulator setting would yield less shots with more power.i shoot it over my chrony to be sure.i looking for a little faster fps and less shots...

 

[tor47]

In normal condition if you increase reg pressure, but leave the hammer spring as is, the velociry will go down, and the gun will use less air per shot.

 

[tor47]

The only scenario I can tink of where velocity increase by upping reg alone, is when the gun already had to much spring tension already

 

[ohio_hunter]

The only scenario I can tink of where velocity increase by upping reg alone, is when the gun already had to much spring tension already

ok thank you,I shoot it over my chrony this weekend and see what I get...

 

[tor47]

You should follow a basic tuning guide when adjusting that hammer spring. Basically find the max speed with current reg setting, and adjust down from there, and stop at the velocity which groups best on paper. It might not nesesarry be the same speed as before. But if you want increased shot count, the gun will use less air the further down on speed you go. If you can shoot with same accuracy at 820-850 range, instead of the "old" speed, the gun will use even less air.

 

[ohio_hunter]

I looking for more fps,maybe up to 880 fps if it shoots well.tuning the fx rifles is pretty simple and easy.i just need a little bit of time to shoot it.it fishing season now according to the boss.