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.