Just a thought before you go changing too much - does your rifle chamber NEW unfired or resized brass or factory ammunition smoothly? If so you might not be bumping the shoulder back far enough when you resize your brass. The fact that you are able to close the bolt at all means that you are within a couple of thou. As mentioned earlier by others try now resetting your sizing die to the stage where you bump it back sufficiently to allow the bolt to close smoothly, I think hot loads aside that this will solve your bolt lift as well as the whole thing is just a little too tight as it is now. You have built a nice looking rifle that shoots well, thats not going to change but you will like it much better if it loads smoothly.