Jack: From about 1956 to 1979, I used the '06 doing much the same kind of work you're discussing. Lived and hunted in Colo, Mo, Wyo, among other places and, for the last 32-yrs, in Idaho. I started hunting with a .270 and, for a brief time I tried the 308 Norma. The '06 was a better choice. Then, in '79, got my hands on a 7mm Rem mag and developed some good loads for it. Much better on pronghorns, better shot placement and range for muleys and every bit as good for elk. Have also used the .338, which is better for elk alone, but for all the above, the 7RM is my choice, without hesitation.