Joe,
I was a little bored tonight and did a search on Chamber Length. This search has 17 pages and I looked through quite a few threads with people asking the same question. I didn't find an answer, but it is an interesting topic. It is right up there with barrel wall thickness, damascus barrels, and pressure. You even asked a similar question back in 2010
http://parkerguns.org/forums/showthr...chamber+length.
Ken