I have owned a Sako 7mm mag and the two deers I did shoot with it ran farther than they should have with good shots. I also hunt with a die-hard 7mm buddy that has never knocked down a deer ever with his 7mm mag. I hunted with a 30-06 before I got my 7mm-mag and always dropped the deer in their tracks. After two deers with the 7mm-mag I switched to a 300 Win Mag and it dumps deer quicker than anyother deer-rifle I have ever seen.
I use 180gr core-locks and winchester power points. The latest monster buck I shot was a 9-pointer that weighed 210lbs. I shot him in the neck and the bullet was found in its lower back after destroying the neck and spine. It also knocked both antlers off. When the deer was shot, it flipping the deer backwards in its tracks. (Pictures and story at www.pabucks.com under "where did the antlers go?") I am a 30cal believer.