I think i read something about this topic before on here and if it already exists can somebody please redirect me so I am not beating a dead horse over again. Haha. I use a .308 5r milspec with a mark 4-4.5-14-50 sfp with the TMR. My question is about range estimation with this scope. My understanding is that at 14x, 1 mil reading is true in the reticle. I was wondering if this is correct of the other power settings. Please confirm or deny. 14x 1 mil reticle reading = 1 mil 11x 1 mil reticle reading =1.27 mil 8x 1 mil reticle reading = 1.75 mil 5x 1 mil reticle reading = 2.8 mil 4.5x 1 mil reticle reading = 3.1 mil The formula i use is taget in inches/36*1000 then divided my mils read= target distance in yards. I know the other formulas but this one is the one i use. So my example is this. 18 inch target reading 2.5 mils in reticle. 1) 18/36*1000=500 2) 2.5 mils in recticle * by 2.8mil (5x equivalent) = 7 3) 500/7=71 yards. So the 18 inch target will be approx. 71 yds away. Is this correct or am I making a mistake with the power readings. I also use a vortex viper ffp so ranging is not a problem at any power setting. I know the easy answer is get a range finder but thats taking the fun outta it. I have a follow up question with hold overs but i wanna make sure i am doing this right with the 2nd focal plane reticle. The vortex is on a target range .223 gun that doesnt see more than 200 yds use so i seldomly use it for range estimation. Please respond. thanks.