The only 6.5x55 that I don't load on the warm side is a Krag. Nice workmanship, but 1 lug is 1 lug, know what I mean?
I have also found a throating difference between the Remington 700 Classic, short(er) throat, and the Winchester/USRA 70 Fwt, long(er) throat.
I also have Swedish Mausers that have been rebarreled to 22-250, 243, 257 Roberts, and 308 that digest pretty warm loads without any issues (yet).
Jeff
