Is it normal?

One (or both) of the gauges isn't accurate I would guess

Yes, inaccurate pressure gauges are 'normal'.

Need to smack it, hit it with the hammer. Russian technology fix. Seen it in multiple movies

milacik is joking around, DO NOT hit a pressurized air gauge (unless you eat Tide pods)

222-187=35 bar difference, still to much difference

Edgun west advertises the digital gauge to be accurate to 1 bar

https://www.edgunwest.com/store/p89/EDgun__EDMU_%28Electronic_gauge%29.html

It looks like the gauge in the picture on the Impact is an Edgun digital. So which one do you trust? Are you going to fill the tank to 250 BAR according to the Edgun gauge, which would put it at around 285 BAR on the filling tank gauge? I think I might find some way to check both of the gauges to see which one is off before I trusted the Edgun gauge. I know they are supposed to be accurate to within 1 BAR but I also know there is a possibility of a factory defect with anything. Try swapping the gauges on two of your rifles and see if the problem follows the Edgun gauge. I doubt 285 BAR would cause a catastrophic failure, 35 over should be well within the burst pressure rating for the rifle, but still. It could blow out an o-ring or some other minor problem you don't need.

He already said he verified the result, 2 other gauges show similar result. The Edmu is way off.

Have you tried to reset the EDMU in the gauge's settings menu? If you do make sure the gauge has no air pressure when you do the reset, or the pressure reading will be way off.

Were you using the same fill system for the other guns? If yes then it is the gun then. Blockage over certain pressure, some slow fill systems develop this kind of behaviour. Need to narrow down where is the restriction. In the gun probably

Are you waiting for the guns tank to cool down and let the pressure normalize before you compare?

Have you tried to reset the EDMU in the gauge's settings menu? If you do make sure the gauge has no air pressure when you do the reset, or the pressure reading will be way off.

Click to expand...

Maybe trying again and making sure the reservoir is absolutely de-gassed to zero, then reset the EDMU to zero? Please let us know what happens.