One thing is people confuse the word magnum with big game. A magnum doesnt mean its a big game gun. the 7 mags only advantage over any other 7 mm is distance, its really only a long range deer gun. its' still 7 mm in diameter, will it kill a moose, yes, but so will my .243
same with a 300 mag, its only advantage over a 30-06 is distance.
If you keep shots under 300 yds, which i reccomend, a 7-08 is perfect.
its been a while since I shot a 7 mag, but this year at deer camp I was forced to sight one in for somebody and all I can say Is Damn! that thing kicks like a mule.