Hi Chuck - I don't think you went overboard, although I haven't any experience of recoil reducers.
With the glass bedding and double crossbolts, you have done all you can to protect the stock from splitting, which tends to happen at the tang. And now that the action is not sticky, you should have a great rifle! Just check it feeds every round from the magazine quickly, but this should be fine with the 375.
Enjoy shooting it!