This is what he wrote We actually did a test on this a bit more than a year ago... We pointed 20 PR3+ domains with a 301 redirect at a money site. It didn't budge for a single money keyword. Our experience is that each site has juice and power for certain keywords, and if you redirect that strength for keyword ranking helps the target site. But, it doesn't help non-keywords. That said, a PR domain would be a great foundation to start a new site on assuming the domain is legit. Man, I hope this makes sense. So does this prove that 301 do not work for boosting ranking in an unrelated site? Because I have an expired domain with 1k backlinks and im wondering what i can use it for now?