I used to put a strip of masking tape on the flats and put lines every inch from the front sight back. Then I put a bucket out at 200 yards if that was the distance I wanted to shoot. I would line up the marks on the tape with the top of the rear sight till I hit the bucket. After a few shots fired I would learn just how much barrel I needed above the rear sight. My front stuffers are zeroed at 50 yards. Halve of the sight blade is above the rear sight for 125 yards.
Put the top of the front blade on where you want to hit and the rear sight when it's past the zero where ever it needs to be like 1/2 blade down or at the base of the front sight. Of course hold off for wind drift too

You shoot it enough you will know where to hold the sights. And after a while you will be shooting with the sights flat and holding over and left or right for the wind at what ever distance you want to shoot.
I cleaned the PM folders out last night. I'm back to 1%

Man the folders where full.