So I need some advice...I went out shooting my Cooper 6.5x284 yesterday. The rifle is topped with a NF NXS 3.5x15x50 so I am confident in the scopes tracking ability. It was a perfect day to shoot because there was no wind. I was not confident in the scope being perfectly level so I brought my level and drew a level line on the target. I shot a group at 100 yards adjusted my scope 30 minutes up and shot another group. The top group was 1/2 minute to the right. I had forgotten to bring a wrench for the scope rings so I could not rotate the scope. I moved back and shot 500 yards and hit the center of my 4" target. I moved back to 700 yards, shot and hit about 5" to the right. I had not adjusted for spin drift but I later calculated that my bullet should have drift .4 minutes to the right when it really drifted about .7 minutes. I shot at 820 yards, I hit about 6.5" to the right. Spin drift calculation says I should adjust .5 minutes although it drifted about .75 minutes. My question is, should I rotate my scope a fuzz to bring the spin drift calculations spot on? Or should I adjust my spin drift outputs to make up for it? If I should rotate the scope, which direction do I rotate it?