I have done several mods to my Discovery including a Magnum Airpower power adjuster, Challenger hammer and heavier hammer spring and have arrived at a nice compromise between power and shot count (21 shots within 4.1% of ES at 30 FPE using JSB 18.13 pellets). I do notice with this set up however that there is a fair amount of movement in the gun caused by the hammer release - enough movement to interfere when I am trying to do precision shooting. Is this caused by hammer bounce rather than just the hammer force and can I do anything about it that will not compromise the power level? Would the Freeflight Hammer Debounce kit help to reduce the 'recoil' from the hammer?
BTW I have the striker on the Challenger hammer recessed 1/16 inch from the hammer surface. Is this an optimal setting for performance / efficiency?
any chance the movement is caused by muzzle flip? Not sure if you could be getting the numbers you are if there was much hammer bounce, but someone else may know better -
HPA Sports used to sell a vented brake for the Discovery, and it did a great job of settling the shot cycle of my Disco -