I now love the 7mm rem mag even more than I did when I posted on this thread back in October. I did a huge spreadsheet while searching for another hunting/target rifle that averaged out trajectories, drift, and energy across factory loads of the same type and bullet weight - ie. avg of all factory 140gr partition/A-frame bullets, avg of all 150gr ballistic tip loads, etc. and added comments on accuracy of the round, availability of ammo from box stores or sporting goods stores and what-not. And the 7mm came out on top based on the raw numbers, with the .270 in second. I love the power and trajectory of the round and with handloads I love the accuracy that can be wrung out of it. With only trigger work and fire-lapping the barrel, I now have my Model 70 in 7mm shooting handloads consistently at well under 1 MOA with the sporter barrel that came on it and shooting around 1 MOA with cheap Federal hunting ammo.
Among common ammo calibers it seems owning a 7mm mag will just about do-it-all, even though the 30-06 seems to be more flexible while shooting almost as flat and carrying close to the same energy with some factory loads. If I could only have one huntign/target rifle it would be a 30-06. If I could have two it would be the 7mm and the 270 or a 25-06.