My opinion is BORE condition has less of an influence than most would think. The basic design of the Luger contributes to a very accurate platform. The things that I have noticed is a tight toggle to receiver fit seems to have the most influence as this maintains the alignment of the front and rear sights. The trigger pull is not really an issue if the shooter has good skills and can maintain the sight alignment until firing pin release. Lugers have long mushy triggers which really foil good shooting by some folks used to a crisp modern day gun's trigger. If they have any flinch at all when releasing the round, a Luger will accenuate this where a modern day gun is a little more forgiving. If you can move the rear toggle side to side much when the gun is assembled, accuracy will probably suffer. The other thing that kills accuracy is not being able to see the sights. I am lucky in that I can see the sights when firing for accuracy. I use a seated position with my progressive bifocals I can move my head until I see a very clear front sight, that helps a bunch. When I walk back up to my target and see groups like this, I have to shake my head in amazement that a gun this old and with this short a barrel can shoot so good!
