I have seen the varmint bullets for 30-06, but I have heard the same thing about rifling twist in a 30-06 (1 in 10") is common I think.
http://www.chuckhawks.com/rifling_twist_rate.htm
I haven't tried them. I just use a 150 grain bullet like other comments said. Works for me, but I haven't tried to sell and pelts either. The only trouble is re-sighting in for the 180's I like for elk.