I am a big 7mm fan currently with 2 7.-08's a 284 and 280, yes alot of overlap. To the op, if you are looking for more speed with heavier bullets and no recoil, I would look at a straight up 280, 160's should do 2800+ and kill as far as you can shoot. I do like the sham wow for efficiency but just have not owned one, I would also agree if going for the heavies, 1:9 would do you good.
George, the 280ai is a tremendous round but no matter what you do, it is not a 7 RM, and no, I am not a fan of the RM but facts are facts, also check the recoil calculators as everyone talks about the 280ai and non magnum recoil, the difference is much less then you think.
