Mr. Rowe, I agree there is a lot of headspace, but I cannot work on that by handloading unless I have a fired case that is safe to at least neck size. I thought I would fire a few of the new Norma cases and see if they develop an interior ring. If they do I think you are right about a different bolt head, which I had not thought about, or setting the barrel back and rechambering. My first thought, if the headspace problem turns out to be incurable is to rebarrel with a genuine .264 bore and a minimum chamber. My bore is somewhat dark and sewer-pipe looking, but I wanted to try it a little bit first. Can you recommend a gunsmith to do any of this work? I really like the little rifle and am willing to spend some money to get it right, as it has no scope holes bored in it and the wood and metal are in good shape. Thanks for your interest.