Dewey, the 160 from a 7-08 will out-penetrate a 180 of same construction from a 30-06... I'm struggling to understand how that is a bad thing.

The 7x57 and 7-08 are two peas in a pod and I doubt anyone would seriously question the 7x57's world-wide game-taking-ability.

I'd not hesitate to tackle a grizzly with any of the above, and would include a 260/6.5x55 with a good 140...

Cartridges are more alike than different.

“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery