DPhillips, .275 was my first thought too, then I looked at the forum heading. I am pretty sure I can't afford the Col.'s personal rifle.I think any of the rounds listed would be great. The .50's would be fun with cast bullets. The 9.3's also interesting. I have owned both .35 whelen and a .338-06. I liked the .338 round quite a bit better. It seemed to have better penetration on game and to me also seemed to shoot quite a bit flatter for some reason. I know that they are almost the same round but those were my impressions.