Since I am home and was able to figure out how to get regular expressions to work in Excel, I parsed some data from Grab A Gun. I wanted to see out of all of their bolt gun offerings (i.e. search on bolt action rifle), how the top 10 calibers ranked by number of offerings. Removing 22LR from the list, this is what I got:
Number of Bolt Action Rifle Models by Caliber
At Grab A Gun; Top 10
Caliber / Number
308 Win / 370
6.5 Creedmoor / 301
300 Win Mag / 192
30-06 / 186
243 Win / 179
270 Win / 156
223 Rem / 155
7mm Mag / 141
7mm-08 / 120
22-250 / 111
Number of Bolt Action Rifle Models by Caliber
At Grab A Gun; Top 10
Caliber / Number
308 Win / 370
6.5 Creedmoor / 301
300 Win Mag / 192
30-06 / 186
243 Win / 179
270 Win / 156
223 Rem / 155
7mm Mag / 141
7mm-08 / 120
22-250 / 111