Do 301 Redirect pass full pagerank?

Eric Enge interviewed Matt Cutts of Google and extracted some interesting tips about Google, but one of the most interesting information is that the 301 redirect do not fully pass Pagerank. Here is a part of interview .

Eric Enge: Let’s say you move from one domain to another and you write yourself a nice little statement that basically instructs the search engine and, any user agent on how to remap from one domain to the other. In a scenario like this, is there some loss in PageRank that can take place simply because the user who originally implemented a link to the site didn't link to it on the new domain?

Matt Cutts: That's a good question, and I am not 100 percent sure about the answer. I can certainly see how there could be some loss of PageRank. I am not 100 percent sure whether the crawling and indexing team has implemented that sort of natural PageRank decay, so I will have to go and check on that specific case. (Note: in a follow on email, Matt confirmed that this is in fact the case. There is some loss of PR through a 301).

We use 301 generally when we move our domain.and use 301 redirect hoping that it would pass Pagerank. As we can conclude for the interview, portion of pagerank is lost, what factors and how much it lose we cant say for sure.

From next time try not to change the url, if you have a choice :)