Huma with an ES of 58?! = a Wacky Regulator –or– a Wacky Operator 🙄 ?

Your are over reg limit and now works unreg

Same answer I gave you over on GTA.

All pcp guns I tune , if I swap out reg setting say to get power for heavier ammo , you always need to adjust hammer weights and springs , and also port sizes matter in transfer ports and and valve size for air flow , but on all PCP guns , there is a point where gun shoots like yours , it is not tuned to shoot 150 bar , I have found if a regulator ES rises from say 10fps to say 20fps with same ammo , usually I will disassemble clean lube washers and swap orings and make sure other things ok like nothing binding in hammer spring , Lastly 150 bar sounds very high for this speed , ca you increase volume and lower reg pressure it will shoot better and be less violent , but your reg is too high for the valve to open fully

inside huma regs is the piston , the housing some orings and bevelle springs , , if you need to rebuild just clean and replace orings and lightly grease things , other then this polishing inner washers so they slide better on shaft , makes them preform a bit better , I have never had one fail , but I have had 2 of the adjuster screws clog and get 0 output , this was not the regs fault it is a tiny hole both times it was a oring mini piece which had made it in there ,

lastly the adjustment screw is set for approx settings you can remove screw and replace seals , and check your pressure with a huma reg tester , sometimes labels are not exact , also if you want to clean and oil it , do you own a huma reg tester ? or other tester , their is many videos if you ever need to service that reg or to lube it , but I would bet it is fine ,

LOU

Like jw says, looks like you don't have enough hammer strike at the higher reg setting. 

Hash Mark for the reg setting just in case.

That's why I made a different hammer for my gun. I made one that would accommodate a .36 diameter spring which is very common. I use a 34lb spring in my gun set at 150b. My ES is like 3fps. But I did give my reg some time to break in before I judged it. Did you? If you want to shoot at 150b, you are going to need a spring that before you have it maxed out, you will see your velocity flatten out. Then you can back it off 10-20 fps and your gun should just be sipping air and have a nice crisp report.

I thought huma regs have a dot on top that you use to set pressure, not the line on the side. Maybe its different by model. 

If you need different spring, try McMaster Carr but need to measure your factory spring to figure out what you need.

Problem SOLVED!

I dialed the regulator back just a tad little bit, worth about 10bar on the sticker from Huma.

And the shot string is now consistent.

Moral of the story for me:

When adjusting a regulator right up at its upper or lower limits do take care of not passing that limit, and rather err on the safe side (unless you enjoy disassembling your gun and pumping from empty, of course!). 



Thanks for all your help.

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