I am really getting the urge to want to build a rifle in one of these calibers. No reason other than I want one. My biggest question is would the Ackley improved version have a little better barrel life. That is what my pee brain seems to understand the benefit of the Ackley improvement is, more velocity is just a free plus. Any thoughts would be nice. Basicly just trying to get the most barrel life I can for this caliber.