Yep 7mm rocks BUT!!!!!!! only in the 180 and 190 grain bullet weights then they are cruise missiles......I had that dilemma as well I almost built a 7 MM STW with a special reamer just for the big 7mm but the components are very hard to find to load so i went with the 338 that gun Eric will be a real laser beam when you get it tuned can not wait to see it...