John , try AA express or JSB express 7.9gr ,in my HW100kt .177 at 65 yards had a group of about no more than 20mm , these pellets are fantastic in most HW and great in my 97.
Last September went out into the field using these pellets ,after spending time testing them in our indoor range , that day I had shot 2 rabbits at 55 yards , dropped them stone dead , with out a kick