Everything I read, including Plaster's Ultimate Sniper, indicates a bag under the front is preferable to a bipod. Little by little, over a few years of working up loads for a Savage 10 .308, I keep finding better groups happen with bipod than a bag. Heel of rifle is supported the same both ways....small bag.

Seems better control of the rifle during firing occurs with a bipod. In this case, the bipod is not a Harris. It's a $30 job with rubber feet. I place nothing to rest the feet upon...it is just on the hard wood bench top.