For reliable repeatability it is hard to beat a bunny ear sandbag strapped onto a tripod type stand, with use of a rear support bag. The rifle should "ride" the bags straight back, and for some rifles there is very little human contact with the rifle, allowing it to do what it wants to each shot, there is no stock pulling or pressure exerted on the stock if used correctly. Bipods are fantastic field accessories, but of limited value on the bench as they tend to chatter backwards on recoil if the rifle is of heavy caliber or worse bend/break.
I no longer carry the Harris bipods, they are ok basic gear, but have now switched over to the Versapod line. These are copies of the famed Parker Hale bipods that many military and police units use, but at a far less cost. They run about the same money as the Harris, but are far more rugged and user friendly. The other nice thing that the Versapod has is instant on/off mounting. I carry mine in a loop on my belt while hunting, that way I do not alter the balance and swing of my rifle, in the event of something close popping up, but if it is a shot at distance, takes under 2 seconds to install and be useful. It is quieter that way as well