Yeah this one has me scratching my head too. Its also kinda vauge. Bolt gun? Well the Winchester 70 and Remington 700 are pretty well matched. Semi-auto? Well you got the Browning BAR. Mil-surp? M1 or 03 Springfield. Single shot? Well as much as I love my T/C the Ruger #1 might be more popular. But this is all subjective of course. You would really have to dig up some hard numbers to get an "accurate" figure.
Brian M