Tuning What's Going On With The Regulator?

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It is your decision if you want to dissasemble the reg, and try to solve the creep, or just leave it. If it takes a couple of ours for the reg pressure to increase 2-3 bar, but othervise being stable, I do not think it will make the gun more accurate. Maybe you should shoot a shot string over a chronograph, from a full fill, and down to 140-135 bar, and check how it performs? If you want you can dryfire the gun all the way down, and keep an eye on the reg pressure. If it is stable, and you do not have any spikes, I personally do not see it as a big problem. 
 
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Ok took 10 shots, before the first shot this is what it read with all other to follow bottle 246bar regulator 138bar.

Shot 1- Bottle 246bar--- Regulator 131bar

Shot 2- Bottle 246bar--- Regulator 124bar

Shot 3- Bottle 245bar--- Regulator 122bar

Shot 4- Bottle 241bar--- Regulator 124bar

Shot 5- Bottle 239bar--- Regulator 123bar

Shot 6- Bottle 237bar--- Regulator 124bar

Shot 7- Bottle 235bar--- Regulator 124bar

Shot 8- Bottle 232bar--- Regulator 124bar

Shot 9- Bottle 230bar--- Regulator 124bar

Shot 10- Bottle 228bar--- Regulator 124bar

Now with this information what I'm not sure of is the regulator goes back up to 122bar within a few seconds but it takes a full minute to get back to 124bar so with this information what are we thinking.
 
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Ok took 10 shots, before the first shot this is what it read with all other to follow bottle 246bar regulator 138bar.

Shot 1- Bottle 246bar--- Regulator 131bar

Shot 2- Bottle 246bar--- Regulator 124bar

Shot 3- Bottle 245bar--- Regulator 122bar

Shot 4- Bottle 241bar--- Regulator 124bar

Shot 5- Bottle 239bar--- Regulator 123bar

Shot 6- Bottle 237bar--- Regulator 124bar

Shot 7- Bottle 235bar--- Regulator 124bar

Shot 8- Bottle 232bar--- Regulator 124bar

Shot 9- Bottle 230bar--- Regulator 124bar

Shot 10- Bottle 228bar--- Regulator 124bar

Now with this information what I'm not sure of is the regulator goes back up to 122bar within a few seconds but it takes a full minute to get back to 124bar so with this information what are we thinking.
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The first shot having higher pressure is probably because the longer period of not using the gun. That can be avoided by dryfire the gun before you insert the magazine, and starts the shooting session. If the pressure stays stable all the way down to 130 bar when you use the gun, I would be very happy. You have to remember that you have a very precise gauge on your gun, so every differrence can be read. Most guns have analoge gauges, and a difference like that would practically means the needle would stay at the same spot. 


 
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Ok still haven't been able to get out so tried raising pressure and than going through the correct process to bring it back down. It crept from 124 to 130 before adjusting so did a slight turn and it jumped up to 144bar left it over night and it was at 148bar fired 2 shots and dropped to 132bar. So I took all the air out and brought back to 124bar where it was before let it sit for 2 hours and stayed around 125-126bar great, shoot it 114-116bar and when it sat crept up to 124bar all might be perfectly fine but its bothering me. I know it was mentioned i have an accurate gauge so I see the numbers moving more clear but I watched a video that Airguns of Arizona put out a few years ago and they mentioned they used $1000 gauge to do their readings to check for creep. Will it void my warranty if I take the regulator out and clean it and examine it and would it void it if I wanted to put a huma regulator in it? 
 
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If you adjust the reg, you have to use the gun, or dryfire many times before it settles. To be honest I do not know if you actually have a problem with your gun, or are searching for a problem (not being rude). Have you done a proper tune on the gun, and shot it over a chronograph? If you get it to shoot good, with low ES, I would say you do not have a problem. I would pick the heaviest slug or pellet you intend to shoot, at your desired max speed, and adjust the necesarry reg pressure, and leave the reg there for a while. Then use the gun some and see how it performs. Then if it doeas not perform good, you can look at the reg again.
 
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If you adjust the reg, you have to use the gun, or dryfire many times before it settles. To be honest I do not know if you actually have a problem with your gun, or are searching for a problem (not being rude). Have you done a proper tune on the gun, and shot it over a chronograph? If you get it to shoot good, with low ES, I would say you do not have a problem. I would pick the heaviest slug or pellet you intend to shoot, at your desired max speed, and adjust the necesarry reg pressure, and leave the reg there for a while. Then use the gun some and see how it performs. Then if it doeas not perform good, you can look at the reg again.
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I did dry fire and settle everything in. As for it being tuned i would hope its pretty well tuned i bought it from Ernest Rowe it was one of his impacts. He does alot of adjusting and tuning on his gear so it is possible it has some wear on it.
 
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To obtain the "true regulator pressure" simply swap out your current regulator gauge for one of these accurate Huma Digital Pressure Gauges. Once you know the "true" reg pressure you can reinstall your Wika & Sekhmet gauges one at a time to see which one of them matches the reading you got from the Huma Digital Pressure Guage. 

Now to address your second concern regarding the fact that it takes a few seconds for your reg gauge to come up to full pressure after each shot instead of resetting itself instantly...this can easily be attributed to the "External Plenum Can" on your rifle. You have a very large amount of plenum space to be refilled after each shot which means it takes a little time than it normally would.

You may consider removing this external plenum can from your rifle, because the factory installed FX Power Plenum on your .35 cal. Impact already has the power potential to push any .25 cal. pellets or slugs faster than they can be shot accurately. You may have the external plenum that is 1/8th BSP that screws into the rear block, or you may have the larger one which would require you to purchase a new rear block from FXUSA to replace the one you have. Good Luck!

Best regards, Chuck

https://www.huma-air.com/Digital-pressure-gauge-65-mm.-G1/8-BSP-(250-bar-working-pressure)
 
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Unscrew the bottle when stored then no reg creep. Don't need to totally unscrew the bottle just 5-6 turns or so however much it takes to remove the constant air pressure and enough so the bottle valve closes by itself. Screw it in only when ready to shoot again no wasted dry fire shots that way.

I noticed Earnest fills his own Impact less than 200bar max there must be a reason for that.
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If I do that and let it settle would that than give me the true regulator pressure?
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Before tearing things apart you could pray and unscrew bottle degass reg then unscrew the reg housing 1/8-1/4 turn see if it does anything to improve things. If not then unscrew the bottle and degass the reg then tighten the reg housing all the way in then try again. Then if still no change back the reg housing up to 1/4 turn from tight.

This silly things may sometime work believe it or not no matter how illogical it may sound.


 
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