Just curious why a custom knob is needed for a one bullet/one gun trajectory, v. installing a plain old knob adjustment and figuring out your own drop chart, taping it to the side of the stock, and referencing it for dial up.
Austin's post is just one more reason I have NOT ordered any custom knobs for any rifle to date because I would be afraid this would happen to me.
So, I'm starting to lean more towards figuring out drop in inches per yardage to target, and calculate come ups, then just tape the sucker to my stock and leave it at that. After a short time, you can memorize your 100 yard come ups I would think, and do a quick reference for anything in between. Especially with a 200 yard zero, I would think this would be ok
Yet, I still like the idea of a knob with all the ACCURATE data on it and just giving a quick spin like they do with Greybull and Huskemaw