Thread: Massive POI shift without suppressor

600mm at 100M is a massive amount... 60 mil or around 20 MOA

are the holes in your paper target round, or is the projectile tumbling ?

another test you can do is to put a cleaning rod up the barrel from the chamber end and see if it is perhaps touching any part of the suppressor ? not foolproof, but worth a try.

also have a very close look at the suppressor, preferably under magnification

are the group sizes you getting with the can on and off similar ?