@peskadot671, not yet. Usually don't do full shot strings, 20 is normally enough to find what I need to know... I'll run 20 over the chrony after about 3 tins of pellets and see how its shooting. Right now, I don't think I'm going to do the power plenum or try and tune for the heavies, since I have a .30 FX Bobcat for when I need more power than what a .25 heavy could ever give...