Bowtech, there may be some other previous posts on this out there if you search and I'm sure there are many different ways to do it correctly. What I did was start at about 15 yards so I'd get a real tight pattern. I used 2 3/4" number 5 pheasants loads for the initial shots at that range because of price and also recoil. Those 3.5" loads knock your teeth loose and are about $2.40 per shell as well. I was shooting low at that range so I moved the aim point in the down direction which actually brings the impact point up. then tested again and had a good pattern there. Then I moved out to 40 yards and switched to 3.5" Winchester Xtended range shells. Patterned good but seemed to be a little to the left so I moved aim point to the left which brings impact back to the right. At that point I was getting a uniform pattern at 40 yards. Then I went back to 20 yards and fired one more shots just to make sure I was good at that distance. Looked good so I left it at that. I skipped shooting at 30 yards for the sake of saving shells!!

Note-Previous to patterning I had polished my barrel using two sections of cleaning rod with a regular bore brush on the end, and attaching the other end into a cordless drill. then I cut one of those green 3m scouring pad to fit once around the brush with some extra length on each side. Stuffed paper towels in the receiver to catch drippage, poured Hopps down the barrel and on the pad, and ran that pad up and down using the drill. There was alot of black residue on that pad and I flipped it over and repeated again. I think it made a big difference in my pattern as I wasn't getting that uniform pattern at 40 yards before.