In responds to your fist post I would build a 375 whether it is a H&H or RUM is up to you. For a mountain rifle cal. on a 700 action with more power I would build a 264 Win Mag. Own one in a sendero and man is it awsome... If you are looking for a rifle builder I would strongly suggess you talk to John Porter. He not only can build you a rifle that will shoot like a house on fire. He can also tailer make you compensation knobs for your pet load so that you can shootwell over 500 yrds without holdover. With a resume like his I know that he is to the point and not a bucket of BS. For more info you might wont to get a copy of BIG GAME ADVENTURES fall/winter 2005 to find out more about John...KEEP SHOOTING & HUNTING HARD!!!