Let me clarify. When I read this forum the attitude I sense is of a " Good Ole Boys Club", where the few posting members consider themselves a cut above everyone else. As to my post, I was curious why the amount of deflection was not proportional to velocity, especially at the speed of sound. I knew it had to do with the shock wave, I was hoping one of the members actually knew exactly why. The first reply incorrectly assumed I was concerned with rimfire, even though I mentioned .45-70 cal. Alinwa then posted that it was a well understood subject, but not by me and that I should read up on it. Gene Beggs then posted that I should search the forum, no answer. What I wanted was information from someone that knew more about it than me. I own a machinery fabrication business, with a full machine shop. I started with air rifles for 5 years, built rifles for and competed in long range centerfire, varmint silhouette, tactical, and 600 yard benchrest. It was after a boring 600 yard contest with serious, no fun competitors, that I tried Silhouette, using military bolt rifles. It was much more enjoyable than benchrest , and the atmosphere was exactly what I was looking for. I am now building a Remington rolling block black powder cartridge rifle for Silhouette competition. Perhaps you are too immersed in the small community of short range Benchrest, take a fresh look at some of these threads and maybe you'll see some of the condescension I sense.