6.5x284 6.5-06AI, or 6-06 if going for economical shooting. A 105 or 140 A-Max or a 115gr or 140 Berger would be swell.

.280AI if going for the best ballistic bang for your buck from a .30-06 donor. Wind is the only reason for this one. The power certainly isn't needed for 'lopes.