Duh. Why didn't I think of that?
The adjustment was pretty obvious once I took out the three screws holding the stock to the action. I left enough of the adjustment screw so that it won't fall out and checked that whacking the butt on the ground doesn't make it go off. I've got nothing to measure the weight in pounds, but it's definitely better. Looking forward to testing it at the range.
Thank you kindly, sir!
Every man, woman, and responsible child has an unalienable individual, civil, Constitutional, and human right to obtain, own, and carry, openly or concealed, any weapon -- rifle, shotgun, handgun, machinegun, anything -- any time, any place, without asking anyone's permission. -- L. Neil Smith