Stumblejumper:

Here are some more facts for you from the "Handloaders Digest 1996 15 Edition" page 82:

A 130 gr. 7mm Barnes X traveling at 3267 f/s penetrated saturated telephone books 15.0".

A 175 gr. 7mm Nosler Partition traveling at 2975 f/s penetrated saturated telephone books 18.4".

There is a 292 f/s velocity between bullets, and the 130 gr. Barnes X still did not over penetrate the 175 gr. Nosler Partition.

I don't use little 140 gr. bullets, or do my hunting companions on heavy large boned game. Come to think of it I don't use little 140 gr. bullets on medium game.

Good luck.