Saw this item on another forum and thought it may well be of interest!
Noticed on other web sites that people are having to ask questions on how, what etc the Police use, when testing Airguns for legal limit power.
Couple of years back a chap WON his case in the High Court, after the Police had confiscated his airguns, then said they'd not prosecute IF he allowed them to scrap them, at the same time saying that their Firearms/Gunsmith had tested his guns and ALL were over the legal limit of 12ft.lbs.
They refused to say what pellet's were used and by whom, so he took them to the