Ok guys here is what I have so far. This data all comes from my daystate Airwolf Xxtreme and my lab radar. Bear in mind my testing here in Michigan was at 34 degrees and kind to windy with a very low battery on my Airwolf didn't notice that until I was shooting. I have a Heli board installed in my Airwolf and it is the extra or extreme Heli board. power level 11 today it shot heavy Mark 2 jsb at 784 fps and it shot the Hades at 885 feet per second. On power level 12 it shot jsb Kings at 940 fps and it shot the Hades at 949 fps. So at least out of my daystate you can expect the same velocity out of Hades as you get out of Kings. Hopefully the wind will die down this weekend and I can shoot some groups but they're not as in as impressive as .22 hades were when I first shot them. Btw labradar says the bc at 885 is .029 and the bc at 949 is.026. Sorry about the mix-up in pellet testing but the battery was dying I literally had turned the gun off for few seconds to get enough charge to get it to fire I haven't shot my .25 since August I would think. I guess my boy scout training didn't pay off