hey guys. got a bit of a problem. im shooting a 7mm rem mag, 26" lilja, and 180 bergers. my powder charge is 70.2gr of H1000 and CCI 250. the chrono read 2920-2928 for 6 shots. took it to 1210 yards and had a 8"wide x 24" high group for another six. ran the numbers through LRH's G7 calc and it gave me a true MV of 2995. can i trust my chrono? and how do i get rid of this vertical?