I believe those stepped elevators are a generic part. That sight might be installed on a .22,a .357,a 30-30,and a .444.
The good news? You can go to the range and ,by trial and error,shooting and looking at targets,learn by doing what ranges the steps work.Like a broken clock that is right twice a day,each step is right for SOME range.It might be just right at 25,72,112,and 140 yds.Or,???. Better to find out than assume or predict.
The experienced gun crank might spend a day at the range with a little file and he might file those steps to be just right at a particular range with a specific load. The same gun crank might think ahead enough to get a spare elevator ramp or two before he starts filing.