Just for some information about the 5r. The 300 Win mag version is available with a 24" bbl with a 5/8x24 threaded muzzle. Prior to 2012, it was offered in a 26" non threaded bbl. The 26" version is still widely available. I own one of the 26" 5r's with an April 2011 build date and I shoot Berger 230 OTMs at 2800 fps and I have plenty of room in the magazine to load into the lands and maintain full function as a repeater.
It is often said that the production 5r is essentially an M24, however, aside from using the same type of rifling and hammer forging machines, the rifles are completely different. The 5r is a great production rifle, and it performs extremely well. I am not sure if Remington puts any special touches in manufacturing or hand picks the parts for the 5r, but mine is machined and assembled with more attention to detail than several other higher end model 700 stainless rifles available for direct comparison.