Ledslinger the 6.5×55 is the old stand fast, but the reason the Creedmoor was developed was for low recoil and barrel life, while not as good as Swede it recoils less and maitains energy after 600 that rivals .30 cartridges.
The PRC is interesting to me because of local roots, George Gardner of GAP helped design that cartridge for shooting 140's to 3150 and no faster, which is a rule in some of these matches.
I have a Creedmoor, but it does nothing better than any Swede, but it's easy to load for, and it's accuracy is superb.