Howdy all. I purchased a pre-fit barrel from a reputable shop for my Savage in 6mm-223 Rem. The barrel is snug on the go-gage and a no-go gauge does not chamber, so I'm confident it's installed correctly. I got to the range today and began shooting groups of increased powder charges to find a good load. ALL of my cases have the following ring 0.120" forward of the rim/head junction. See this picture for the worst offender: The barrel is machined with a cone breech leaving the case head unsupported to that line. That line is 0.250" forward of the bolt face and 0.120" forward of the head/rim junction. As I understand, Savage pre-fits are supposed to have a flat breech with 0.130-0.140" case protrusion when chambered, meaning the steel barrel acts as the pressure vessel with only the rim of the case protruding. In my case, the brass case is holding pressure radially, instead of axially. My theory and course of action (please provide input): I'm fairly certain the cone breech is a mistake, the manufacturer should have never left that much case head exposed. I plan on not shooting this anymore, since I think this is unsafe and I'm going to ask the manufacturer to remake my barrel with a flat breech and the correct cartridge protrusion. What do ya'll think? Thanks a lot.