In another thread, http://www.longrangehunting.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=1&t=000559 I asked about opinions on a long range caliber. it seemed the general concensus was that I would be better off sticking with a .308 diameter bullet and going up in weight. I am going to be getting a new rifle for just this purpose. Out of the factory senderos available in ultra mag calibers, would you still say get the .308 diameter, (300 ultra) instead of a 338 or 375? Sorry to ask so many questions, I just want to be sure Im getting the best factory gun for the task at hand!