i just sold my 7mm mag, i think it comes down realy to preferance, a 308,30-06,and 270 for 90% of hunting out there will do the job perfectly, i think people put to much bravado into the heavy hitter big magnum barrel burnner's, not saying they don't have a place and can be very usefull especially on big game, i know of guy's back home who have one rifle in 300 win mag and only hunt deer and wonder why i can put down deer faster with a 308 or 270 it's all about choosing the right bullet and velocity for animal density, sometimes a 300 winmag just puts the hole clean through a light skined deer and the 270 will do more internal damage thus killing the animal quicker and less painfully.
anyway the magnums have there use but now days you can load a 30-06 up to simaler velocities as a light 300 win mag load, and there realy and truely isnt a animal in north america you cant take with 308,30-06,or 270.