I have struggled with StrelokPro from day 1. What am I doing wrong. Here is my info. NSA slugs .22 .23gr BC .75 FPS 942, scope height 3.23 (adjustable mounts) Athlon Helos scope in mrad. 942 FPS verified by 2 different chronys, they were only 1 fps apart. 50 yd zero. OK so I went out to 131 yds...