I hesitate to post after Saltydog..
..but what the heck! (Wife says I'm OK..but I did catch her in a white lie once..hmmmm)....
I have two 300 mags..one 30-06..and eight 308's....They all are good for what I use them for....They can all kill the same game..but I think some are better suited for different uses....It may be a different gun type that makes as big a difference as the caliber....I hunt with them all....
Is'nt the military promoting more use of the 300 win mag?
Oh..and Ken B........A buddy took bull elk over 400 yrds..with a 338 mag....One shot was on the move....He is convinced in magnum calibers for big game..and shoots them well....He shoots a 30-06 for whitetail....