Thought I would share my experience of this new gun. Bought 2 weeks ago from Welsh Will. He said it was shooting at about 11.3 ftlb. It smoked a bit for say 30 pellets. After about 1000 pellets I chrono'd it and it had dropped in power..about 720fps with AA diablo field 8.4. After another 1000 pellets it had dropped to under 700fps. Took it back to Will who changed the piston seal and tried 2 new springs..after some variations it settled to under 700fps again. Umarex were contacted and replaced the gun immediately. Had new gun the next day. Disappointing to have a duff gun but great service from Will and Umarex. Feeding new gun pellets and will see how it goes.