How are you loading the pellets into the mag, just seating to skirt depth, or pushing them further into the mag? Instructions say to push them deeper into the mag. Have you tried cleaning the barrel with supplied brush, yes it should come with one. Mine was low and left from new, but plenty of adjustment on rear sight. Sorry to have to ask, but you realise it's anti-clockwise to raise POI, also, is the front sight sat properly flush with the barrel shroud, I changed mine for the widest blade, but had to take a sharp blade to it to remove the burrs so it sat in the slot properly.