I'm one of the few folks you will hear from that seems to have gotten a bad Ruger. My M77 MkII .30-06 gives me fits with accuracy problems, even after my gunsmith did trigger work and bedding for me. Extensive reload experiments have yet to yield a load which will group consistently.[:@] In spite of this, I still have managed to kill deer and wild boar with this rifle, so even though it doesn't shoot tiny groups it does shoot well enough to kill game cleanly.
My buddy, on the other hand, got an M77 MkII .30-06 in stainless with the newer style synthetic stock. His is a very accurate rifle. I offered to trade him, with predictable results.
I'm not done tinkering with my Ruger yet, but be advised, ANY rifle maker can ship a rifle that behaves badly. I've got three other bolt action hunting rifles that are all great shooters, a Remington, a Winchester and a CZ550. The Winchester needed it's trigger lightened and barrel floated before I cared to shoot it in front of witnesses, the Remington did ok but needed a handload developed, and the CZ needed no work at all, shooting MOA even with cheap PMC 6.5 Swede factory loads.
If you DO happen to ever get a lemon Ruger, don't make the mistake that I did and take it to your gunsmith; let Ruger have a crack at it first. Ruger's customer service has a well deserved reputation for excellence. Ruger rifles are a great value and are, in my opinion, one of the more eye-pleasing rifles available. In spite of my own experience I would not hesitate to buy another Ruger.