I am a big fan of the 7mm Rem Mag. I truly think it feel like a stiff 30-06 load, and this is consistent with most all the recoil calculators out there. In a sporting weight rifle, say 9lb, with 1 160gr bullet at 3000fps, you're ballparking 20ft/lb. Not bad by most standards, but everyone is different in their tolerance for recoil. The 7mmRM give you more velocity, driving higher BC bullets than an '06 for deeper penetration and more retained energy thus flatter as well. On the upper end, a 7mmRM will drive a 175 around 2900 in almost every rifle with at least a 24'" barrel, where as the '06 is more like 2800ish with a 180, of lower BC. And it does this with modest recoil. A 300, to me, is a big step up in recoil, while only offering a disproportionately small increase in energy. The 7mmRM is very well established all around the world, and has a good reputation for being accurate. Of course, the 30-06 is in the same class, and is a proven winner as well, and you can't go wrong with it either. I think if I need more than a 7mmRM, than I need a lot more, as in 375 H and H, and a 30-06 or any 300 just isn't enough of a step up. But for any non dangerous game, the 7mmRM is a good and capable round.