I have 7" low by 2" left change in point of impact w/o my can and the muzzle cap on. Is that normal? I have it on a Savage Model 10 FPSR in .308. Group seems to be as good or maybe a little better with it on.
Mine is the same except mine runs 6" low and 2" left and my groups are better with the can. It is normal and repeatable. Log the data and keep shooting...