On the few I've tinkered with most shot better with the bumps. There wasn't much difference either way, in the nature of fine tuning. Others say they've had the opposite experience. I put the bumps back with bedding compound, or more accurately made a little pad where the bumps were. You hang 5 pounds or so from the barrel, pulling it away from the stock. When it all sets up it translates (vaguely) to the barrel having 5 pounds downward force against the stock. About where you started.
What was more helpful was bedding the action. Just a little at the tang and the recoil lug so the parts of the action that contact the stock have full contact. As with all mass produced products the mating surfaces aren't perfectly true and flat. Still the improvement in accuracy was small, it was good to start with.
