I tried 115 Winchester , 150 federal symtec,147 Federal HST . All shot to the left and about a 2-2.5 inch group . The 147 prolly shot under 2 inch . But I could prolly measure center of both groups and be exactly about the same apart from center of target to the left . The set screws where tight I had to break them loose to try to move the sight . If I didn’t rest it I could see it being me . But 3 different ammo and 4 different groups in exact spot I would assume it’s the pistol unless I’m that consistently bad haha . Which I’m not a new shooter but not a expert.