Quote Originally Posted by tammons
The 7mm will have better BC,
+1 The higher BC usually equates to a greater potential for accuracy. A lot of the info about long-range hunting semms to favor the 7mm over the 30 caliber. If you choose copper bullets over lead-core, bearing surface can become a factor also. Copper bullets of the same diameter have to be longer to achieve the same weight. Longer bullets generally mean longer bearing surfaces.

There is some good information about caliber, twist rate and bullet selection here: http://www.cactustactical.com/reloading/tips5.pdf Substitute 'tips1' (thru 4) in the URL to see the other pages.