7mm are great, but they cannot be compared to .338's. They are fun to shoot and definately have their place, and for the recoil they have tremendous ballistics.
.338's are a better long range hunting round for heavy game
(not whitetail deer or hogs).
Its like watching a heavywieght boxer fight a midlle wieght. both bring something impressive to the table, but I can tell you whose hand will be raised at the end of the night 9 times out of 10.
I have very few rifles, but I have a 7mm and a .338. They both have their place.