Popper, I see it this way. My personal accuracy "standard" is based on what the gun will do with good handloads using jacketed bullets. I expect more out of the .308 "sniper" rifle than I do from my old .30/30 M94.
If the rifle will not shoot jacketed bullets well, and I cannot find anything obvious that is causing it, I trade or sell it. The current quality of commercial rifles is so good that a "bad" rifle is rare. Spending the money to "blueprint" a rifle is not worth it to me. I have only had to dispose of one rifle that would not shoot for me - a .22 hornet Handi-Rifle.