I am interested in some details on these type reticles ,here's my wonderings. They come in different ? stages of reticles to match different performance levels of cartridges. And you can set the gun to the reticle and all the hash marks ? how do you fine tune this set-up ? Do you have to accept a possible higher or lower point of impact than normal at 100 yds -to get the 4-500yd reticles to work? I can't figure out how the reticle system can be for -say a 243 -a 243 can shoot a 55gr bullet at 4000fps or a 105gr at 3000fps ,how do you set the reticle for the differing trajectories ?