I have a .25 avenger , an Arken scope , Donny fl tanto. Reg set at 2300-2400 ish. Hammer spring backed all the way off. Shooting JSB Hade 26.54 gr and Jsb king .25 25.39 gr. At 20yds out 60 yds groups are almost a ragged hole or at least touching. At 100 groups start to open up really bad...