SO, have been looking for a 50-70 Barrel for a new rifle. Used mostly for hunting. One well known barrel company quoted their barrel as being .500 in Bore and .508 in grooves. 50-70 barrels harder to find that I figured. But having said that, from everything I have read, the .508 is a little scary to me. Molds cast bullets of .513 to .515. I know a bullet can be sized to almost what ever you want, but I dont think I want to try and put a jacketed bullet or a commercial factory load that uses a .512 cast bullet through a .508 barrel. Thoughts?