Ha. Rev said I was opening a can of worms here. I don't think the 7mm vs 6.5 is about bullet diameter but about the extra 500ish foot pounds of energy delivered at hunting ranges.
Rev: I like the look of the Vanguard FirstLite better than the new Meateater rifle, but he's a broke 22yo so he's looking at the cheaper models.
Edit: looks like Conundrum beat me to the point and said it better. I also hunt with 7mm rem mag.