I have ordered two of the new Montana 1999 Profesional Hunter Modle. They predict that they will be manfactured and shiped next fall. Thw action will handle any round between ,375 H&H and .505 Gibs. The bolt face options are .534, .604, and .648. I plant to hunt Africa and Alaska. One or both will be open sights only. I would like some help with cartrige choice. I have allways wanted a .460 weatherby, but the .416 weatherby, .505 gibs, .500 jeffry. .495 A Square or 500 A Square are also interisting. Also how heavy would build them, I don't want a muzle break. Thanks