If it is an original, leave it alone...put a small shim on it. black plastic electrical tape works well..
If it is repro, you can file /grind a little off between the mating surfaces, take the screw out and you'll be able to do it.
A spring type would be different. you can put a little epoxy, colored if you have some paint colors. around the mating edge with the stock.
Put car wax on the metal, and then put it on so the spring holds tight. this will make up for some shrinkage from age. the car wax, or any wax that dries to a white powder and had to be wiped off works. The epoxy will not stick to it. good for any bedding problem.
good thing is, you have not touched the wood of the gun..it can always be removed
sometimes the spring that holds the band won't come up enough. do the epoxy thing in the pin hole. , let it dry in the UP position then it will have more strength. . Ken