While the 7mm mags are the most common I've also found out the hard way in doing reblues that they also did 30/06s and 300 win mags. I want to say I've seen a 264 win mag too but I wouldn't swear to it.
That gunshop off Muldoon in between the smokeshop and beauty salon had a Rem 700 264 with the stainless barrel.. I should of bought it too it was priced right.. But that was 2yrs ago..