When you have a rifle like you described ... the best you can do is make no alterations to it. Don't make any changes to it that would effect the accuracy to it. Instead, since you have a set load you can depend on, and you know what it would take to make the rifle shoot so well.. you can play with different loads, powders, caps, and swab techniques to see if you can find other loads that are as accurate. The best thing is, no matter what happens, you have a set load for the rifle that will do every thing you need. In the mean time, you can save some money on the side and some day purchase another rifle you like.