I Cant remember all the ins and outs now, when setting it up i used a chrone to work out my bullet speed, then work out my drop. IT can be used with different caibers and lines are fixed.
I use hornady sst and have found it B&C reliable to 450yards for me so far and every think in between. Bullet seems to hit where i want , just allowing for drift on my part.
The only thing to be aware of is at 100y you will be shooting over inch and a half high only becomes a problem if you head or neck shoot.
I think there is info on set up on the leupold web site
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