The size of the Bounty was increased dramatically between the original and "replica" which was built for Tecnicolor.

Compare the draft, which barely increased in from orginal to the much larger "replica"

http://easternyachts.com/bounty/index.htm - Replica

http://en.wikipedia.org/wiki/HMS_Bounty - Real McCoy (w/ Captain Blye).

As an aside, while Blye may have been a terrible human being, there is no question that he knew how to sail. After they put him in that little lifeboat, he managed to sail it back to safety with little more than his wits and a few people on board in the "mighty" Pacific.