I'll give it a try. For the most part, turrets can't be changed. If you want Target style turrets you have to buy a scope that comes with them. I think your real question is' "How to come up with a drop table?" For that, you need a computer program like
http://www.eskimo.com/~jbm/ballistics/traj...traj_basic.htmlor one of the other programs available on the web. I use a program that works in MS Excel. I set up my rifle with my standend load at my home range. If I'm going Prairie dog shooting in the Dakotas, I enter the alt and forcast temps into my program and print out a Come Up Card for those conditions. It won't be exact but it will be close.
The come ups are printed on address labels and stuck to a piece of plastic that I keep with my ammo.