IMO since you only have one stock screw you are going to create more problems than you will ever solve. It obviously takes two points or more for the action to rest upon, and with one screw you can not pick those points with screw pressure, the stock will pick those points.

Again IMO the only way to do want you want to do is to build up the stock with bedding compound, and fully bed the action. that is the only way you can control the pressure points on your action, as well as the pressure points on your barrel.

This is just my opinion(as I stated), but I have done this before, and bedding the action has always given me good results. Your other option is Pillar bedding, but I do not know how you would do that with just one screw??? Tom.