RandallT -

Most people think 7mm Rem Mag when you say 7mm, so thats what I will assume you mean.

You can't really compare the 7mm Rem mag to the 7mm-08, as they are in two different leagues. A 7mm-08 is a 308 winchester case necked down to accept a .284" bullet.

The nice thing about a 7mm-08 is it duplicates/exceeds the performance of a 308 winchester, has very minimal recoil, are inherently accurate, and will kill anything in North America.