Shooting off a bipod requires a very different technique versus shooting off traditional bags. Takes a lot of practice and "unlearning" old habits. Forget everything related to free-recoil shooting.
Seach through the Daily Bulletin archives. There was a great article about shooting tiny groups via bipod.I agree, and it was to the point where I was trying to figure out what happened to my rifles accuracy!!!...but I seem to be unable to figure out the "technique"....when I do a lot of load testing, etc. off the bench, just about the time I start getting the hang of it and shooting really good groups it's time to switch back to hunting with the bipod and I have to learn "how to shoot" all over again. The only thing that has worked for me is a lot of shooting off the bipod to get used to it again. Probably not a bad thing...I can always use the practice!!!
I use the 6-9" model and I have both the notched and older style. I always use the "S" type that swivels. I guess I am just plain slow because I still have yet to figure out what those notches are supposed to do for me. One thing I have added to all my rifles {well, the ones that I have a bipod on} is the Accu-Shot monopod. A simple piece of 550 paracord tied between the two legs at the bottom works as a "quick deploy" handle to pull them down into shooting position or snap them back up quick and easy.
Seach through the Daily Bulletin archives. There was a great article about shooting tiny groups via bipod.
Edit: Here's the article.
http://www.accurateshooter.com/shooting-skills/bugholes-from-bipod/
The Chinese knock offs are not Harris.