not sure about my ele. estimates need advice
i went to shoot at a nra range with silhouettes at 2,3,4, and 500 meters yesterday, and i had just plugged in my bullet,my ASSUMED velocity, and other stuff into jmb and wrote it all down. i got there, hit 200 and 300 meters just fine, then couldnt get 400, no one could spot where it was going, and i couldnt either, so i ended up goin for 500 meters, with some spotting there we got it dialed and then i hit it several times. BUT, my ele. adjustment was 12 min to start with at 500 meters, ended up dialing it on at 9.25. so i guess thats y i wasnt hitting at 400 because i had dialed 8.25 for that. SO, i got home and kept adding velocity in jmb untill it gave me the right amount of moa for 500 meters, the amount i was using. so could my rifle actually be shooting the 350 fps more than what the sierra load manual estimates? or is it another variable? with this load the sierra manual estimates 2800 fps, but there was less drop than that... so what do you guys think? thanks!