Not a 7mm, but I've shot a number of elk with them in 165 and 180 gr from a 300WSM and a 30-06. They're very accurate and they do kill quickly but I think the meat waste is excessive. They tend to blow up on impact.
Shoulder shots or heart/lung shots?
Both. The bullet almost explodes on impact leaving a 12" wide area of bloodshot mush. It still penetrates for the kill but you leave a lot of meat on the hill. If it's the ribs there isn't a lot of meat there to lose but if you hit the shoulder, you can mess up quite a few steaks.
