Correct Sight Picture

[Mauser720]

I am interested in trying out my artillery Luger at a short range, and graudually working up to 600 yards just to see what it will do. I have the correct shoulder stock with it and intend to use a bench rest table for steadiness. At this point I have not shot it even once, and I am wondering about the correct sight picture. Here are my questions:

(1) Is it correct to use the standard "6-O'Clock" hold at 100 yards? (100 meters is where the first line of adjustment is indicated on the rear sight.) With such a "6-O'Clock" the bullet should impact the center of the bulls-eye target.

(2) I have read that the sights must be "7-degrees" to the left in order for the point of impact to be correct at the longer ranges. I have read this has something to do with the physics of the spin imparted to the bullet and becomes noticeable at these longer ranges. This Luger has not been fired much, and the "fine tune" adjustable windage front sight is already slightly adjusted to the left. (I have ordered a fine tune sight adjustment tool from England) The rear sight also has this fine tune adjustment capability; however, it is only for elevation. I know I have to start out at a shorter distance. I'm wondering if anyone has any experience with such artillery sights at these longer ranges?

Thank you for any help or advice.

Ron