I have been waffling back and forth on this, between the 7 RUM and the 300 RUM and right now I am leaning to the 7. My reasoning is that the 7 RUM will deliver a 180 gr bullet well past 1K with elk killing velocity and momentum about as well as a 300 RUM will deliver a 200-210 gr bullet with a little less kick and i think I will be able to get by with no brake which is a big plus for me since I'm not fond of them.
On the economic practicle level, the RUMs can be had in a facory Sendero which is a good out of the box platform that seems to perform very well. Shooting the factory barrel will be a good time to get familiar with LR shooting and when it's burned out I can get the actioned tuned up and rebarrel with a little more potent cartridge like and improved 7-338 Lapua along the lines of a 7 AM but probably a little less modified. As well as a little more performance I would be able to use Lapua brass.
Sounds like a plan to me, at least for this week