I'm certainly not a pro of shooting or loading. But what I do with my chargemaster is once it beeps. I check the weight and if its over I shake out a couple grains of powder so I'm guessing I'm within a 1/10 of a gr. What I think helps me is when I seat my bullets if its easy it goes to the left if its a Lil stiffer it goes right. Sorry I know you didn't ask all that but not sure on exact vertical. I do know last 40 or so I shot my large group was 14 small was 2.5 my average was between 5 to 6 inches. I'm shooting a243 and I loaded 10 with h4350 between 38to39 gr then I shot them all together an shot Lil under an inch at 100.So I figured if I was within a 1/10 I should probably practice my shooting more than tinkering with loading. I have tried to be to technical and confused myself. Ha doesn't take much. Oh and my long shots are 900 that's as long as I have.