Sorry, Woody. It seems pointless to compare to different cases if you limit the comparison to pushing the same projectile at the same velocity.
The 7mmRemMag will out perform the 284Win ballistically - it can throw the same weight projectile at a higher velocity. The compromise is in what you gain in wind drift and hitting energy vs the increased cost and the recoil. As most of my hunting shots are taken at relatively short ranges i feel the RemMag is a bit of overkill. I am a fan of using one projectile for everything (short and long range... hunting and target shooting) and i think the 284Win would be a good compromise for this (162Amax, 168Berger, 168LRAB, etc). Recoil can be tamed with suppressor or even better a muzzle brake - again both are compromises, the suppressor can over balance a rifle and a brake in the bush can be real loud. Sure the 7mmRemMag will be better at longer distances but a 338 would be better again... everything is a compromise...
Sure, I am a big fan of efficiency though - down loading a calibre isn't an efficient use of that case capacity in my opinion. Also I like a reasonably full case to ensure good powder distribution and ignition without making a flame thrower.
Again, what ever floats your boat...
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