Sometimes when checking a gun to see if it is me or the gun- I have a BIG vise with some "soft jaws",that I put the gun into and fire it from there a few times to see where it hitsThen I move the sights or scopes POA to that POI.Works great and the gun is done now I just have to beThe Squeeze NOT the jerkin the guns life.PS: this also works great when dealing with women.Justsayn