I was wondering so I could run a ballistic calaulator and try and figure out which height would offer the best second zero. May not be much difference, but I was just going to help out where ever I can. The bell size won't really matter because I am currently planning on running a vortex viper 2.5-10x32 HSLR
For example. Using Blackhills 175 BTHP as an example and using bore to optic height as the variable.
2" above bore give a 50 and a second zero at about 140
2.5" above bore give a 50 and a second zero at about 175
3" above bore give a 50 and a second zero at about 205
I want to be able to work on the calculations and get my exact zero on the fly, but till I am confident I am trying to set up the rifle to have a good first and second zero.