This is a common problem with the 10/22 resulting from the sloppy fit between the barrel shank and the cast aluminum receiver, commonly referred to as barrel droop. No need to spend any money, it is an easy fix. All that is required is an allen key and a small piece of shim cut from an aluminum pop can or other shimming material of equal thickness. This is used to shim the space between the barrel and the aluminum receiver bit that protrudes to receive the threaded V-block screws.
This procedure will create a snugger fit between barrel and receiver and will give you the extra feet of elevation adjustment that you are looking for.