The 7 Rem mag has been my favorite for years, and always lands near the top in "if you could have only one rifle" polls.
Heavy -for -caliber ammo has few drawbacks, other than a bit more recoil. Shooting 175gr 7mm loads doesnt have much more kick than a 180gr 30-06 load.
The benefits are many, as others have suggested, less violent expansion-especially important at close range, better downrange energy, bucks wind MUCH better, premium bullets not necessary for excellent performance.
I've used 140, 150, 160, 175, bullets. The 175 has been the most consistent and least trouble to get an accurate load worked up for 3 different rifles- Ruger M77, Rem 700, my current favorite-custom barreled Mauser. That one shoots factory ammo near MOA accurate.
If you're using "off the shelf" ammo, the premium stuff will probably get you better accuracy, but the high-end bullets really aren't needed. Using standard factory stuff may give you equal accuracy, but require more testing to discover which load works best.
More shooting, that's always a good thing!
