Both are great deer guns. Many argue that they are the "perfect" deer guns. Both shoot 140 grains as a base bullet (ballistically about equal). The 7mm can load heavier and the 260 can load lighter.

I don't know why everybody on this board says the 260 is falling out of favor. On another board everybody says it's getting more popular. Nobody ever has real data to support either contention. The only way I can figure is that Remington, Ruger, and Kimber still make rifles for the 260. Remington makes a 120 grain accutip and a 140 grain core-lokt. Federal makes a 120 grain ballistic tip and a 140 grain gameking. All for about $20 a box. For deer, I don't know why one needs more than those choices. You can special order bullets from 100 grains to 160 grains in a variety of bullet choices for the 260.

Both are good guns. I don't think you can go wrong with either. I own two 260s and I have a brother who shoots a 7mm-08, both will put a deer down at 250 yards without blinking an eye!