Brocock/BRK BRK Pathfinder regulator adjustment

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longdog

longdog

Member
May 24, 2023
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San Angelo Texas
I just bought a used BRK Pathfinder that the previous owner adjusted(lowered) the regulator pressure and hammer spring setting as he was trying to get the shot count up.
I can only get just over 22fpe out of it and would like to go back to the factory energy levels of approximately 27fpe. I’m not concerned with the shot count at all.
Would also be helpful to know what the factory hammer spring setting was and the original reg. pressure.
I have searched this forum and the internet and have found nothing.
I suppose that I could contact AOA and they might help….I think they are a BRK dealer.
The owners manuals are of no help as Brocock doesn’t suggest such adjustments.
I would not have purchased the rifle if I had known he had messed with the factory settings on such a “new” rifle. It was described to be in as new condition, and it is cosmetically. I guess I should have asked if he had “tuned” it.
Thanks in advance for your help.
Norris

Edit:
Except for the psi value and turns, I think I’ve figured it out.
Love this gun.
Time for a fresh battery in the chrono.
 
Last edited:
Mine as received has the regulator set at 150 BAR.

Some strings I shot through mine as received. As you can see, none of them reached 27 fpe.

Four, ten shot strings through Pathfinder XR

Please be mindful that these are simply my first shot strings out of this gun. So the numbers may change. I sent 10 Crosman Premier Hollowpoints at all three TP settings. And one string with JSB Exact Jumbo 18s, TP on high. I’ve done nothing to this gun, just unboxed, scoped it and started shooting.



CPHPs / TP High

Hi: 846 Low: 835 Avg: 841Std: 3 ES: 11 FPE: 22.4


CPHPs / TP Med

Hi: 836 Low: 829 Avg: 834Std: 2.27 ES: 7 FPE: 22


CPHPs / TP Low

Hi: 794. Low: 784 Avg: 789Std: 3.36 ES: 10 FPE: 19.7


JSB Exact Jumbo 18s/ TP High

Hi: 794 Low: 782 Avg: 788Std: 4.94 ES: 12 FPE: 24.8
 
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longdog said:
You can raise the regulator pressure without degassing but you cannot lower it without degassing.
Click to expand...
You dry fire a shot with the screwdriver tip already set on the adjustment screw. At the shot turn the screw, slightly, incrementally… There is a video on YouTube on how to. I lower my reg this way without damage.
 
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longdog said:
I've watched the video, but for me, I'll degass to lower the regulator pressure.
Chris at Airguns of Arizona suggests degassing by loosening the fill fitting to lower the regulator pressure.
Obviously either way works.
Click to expand...
Both ways work, one quickly, and can be done multiple times on the fly. As opposed to degassing over and over, when making more than one adjustment, it’s ponderous and wasteful of HPA.
 
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