No not likely. It'll just mirror the chamber perfectly after 2-3 firings. First is not quite tight to it second typically is but not always. By the third firing, it's perfect. Most times two but three to be safe. No change to load dataSo are you saying it will take a full 3 firings to get it we’re it needs to be? I’ve never heard of that. I guess better question is will I have to redo my load work after the 3rd firing or is it just very little gained after first firing?