I'd also sell the RUM if I could find a buyer, and buy the '06. Today, the '06 is virtually identical to the .300H&H with factory Hornady light mags. If you can get VV or VN powders, you can load it to the same levels. That is, if you feel the '06 was lacking with old factory level ballistics. It isn't.
: After the old H&H, there was no real improvement in small bores - by that I mean, shoving the same bullet even faster makes little difference to the game. 2,800fps and change is all a 180gr. bullet needs for kiling anything worthy at normal game ranges.
: Get closer and be more accurate.