Re: Will 30-284 WIN give more ooph?
Man, if this is going to be your "close" range gun, I hate to see how heavy your Tomahawk is going to be. Anyhow, I am building a 338-284 on a Ruger "tang safety" action. This is meant to be a "mountain" rifle of sorts, and weigh-in under 7lbs, about half of what you are talking about buiding. The only reason I went with the 338-284 was because I am building on a short action (though they are longer than the remington short action), and I can get 338-06 ballistics from it. Otherwise I would have went with the 338-06. Your gun will weigh about 15lbs, so why worry about building on a short action. I would, as everyone said above, buy a long action and build something I really wanted.
Learn from others mistakes, you won't live long enough to make them all yourself