Are you using a software program for your ballistics calculations? If so, which one?That is one of my prairie dog rigs, of which all of them having the same Vortex scope, all are FFP in mils. I avoided both FFP & mils for years, but they really do work well for prairie dogging. The reticle has a hash mark at every half mil, which corresponds almost perfect for every 50 yards in a normal 223 load for holding, no dialing needed.
Every other rifle I use for hunting is a "normal" SFP with MOA.