Re: past available mildots
Lindy is correct, and the holdover data should be available from a ballistic program.
You may also want to try running your data with a 500yd or 800yd zero, have that dialed on your scope and holdover from there. This will allow you more windage if you want to dial windage (at max elevation dialed you will have less avaiable windage adjustment). Also many time the actual adjustment stops prior to the knob stopping (not sure about NF).
There is always the practical field version of all this discussion:
-when you are shooting at said 1100yds, watch where your impact is in the scope and use that to know how much you need to hold over to correct your shot. As folks with much more knowledge of this stuff tell me, "the bullet doesn't lie".