While puttering in the garage today I came up with another way to look at these results, not knowing the full survey design. Time of year could make a difference if it was just before sheep season versus just before moose.
Maybe the survey just tells us who goes to the range, maybe 30-06 owners and 338 owners tend to feel they can use a tune up.
Though, from my own experience I'd say its pretty representative of Alaskan hunters' choices. I was surprised how far down the 308 was, how far up for the 338, and the frequency of the 300 Wby. I'm not at all surprised at the strong 270 showing, it was darned popular in the 70's and 80's, even though a lot of old timers really bad mouthed it.
I too would have liked to see the list of stragglers. Maybe I'll email the rifle range guys and see if they can share more info.