Was that kentonindustries?
They are one step further and offer ballistic cams for your specific rifle load.
I just checked that site out. Neat idea, but not sure if I want pre-determined yardages on the knob. Then your stuck with the load/bullet you picked that day. I'm not fixed on a particular load yet.
I checked with Burris and they replied that it can be done for $85 + shipping. You have to ship to Burris in USA.




























