Not my video but he says .308 at 1 mile with 155 Sierra over 45 gr Varget. According to JBM (est 2900 fps) thats around 120" elevation at 100y to make that hit. Wonder how big that rock actually is. Bullet TOF is ~ 4 sec and bullet according to JBM has been subsonic for 750 yards.
http://www.youtube.com/watch?v=qvo-UKLhei0&feature=related
http://www.youtube.com/watch?v=qvo-UKLhei0&feature=related