Building a .280 AI with a pre 64 model 70 action, Mcmillan hunter stock and a Rock Creek 5R Barrel. It will be trued and from a local gunsmith with a good reputation. Has anyone used one of these barrels? Seems they are pretty good based on my gunsmiths results. No reason to question him just wondering accuracy others have had out of that barrel vs the standard one. I know I am gonna love this new mountain rifle.