RE: 7mm mag
7mm Rem Mag is my all around favorite big game cartridge. I find the recoil to be minimal at best (and I don't like hard kicking rifles). If I could afford to I'd shoot mine all day shooting P-Dogs. But those days are gone now with the costs of reloading supplies.
My 7mm Rem is a Browning A-Bolt Stalker, and it is also the most accurate out of the box rifle I own. It will put 3 shots under .5MOA at 100 yards, and it will do that at 300 yards for me on a good day as well. It does open up to about 1.5" on a bad day at 300 yards.