Tuned my FX Impact .30 cal (Slug-Liner) to shoot Varmint Knockers 50 grs slugs at 940 fps, with 130 bar reg-pressure. This is my best grouping at 80 yards.
I know you were eager to shoot or something, but that was a seriously dumb place to shoot. Doing things like this is how you get airguns banned where you live, or get the swat team kicking in your door and killing your dog. Please, use some common sense.