Exactly! For example I have a .308 barrel with about 5500 full power rounds through it. I could now load it scheutzen style by breech seating a bullet and then loading a charged case! I discovered the throat wear in the process of working up cast bullet loads. The throat will still engrave a normally seated .310" lead bullet but not a normally seated .308" jacketed bullet. I don't need a borescope to tell me the throat is going. As the throat wear advances it can be measured well enough with a cleaning rod, a bullet, a piece of masking tape, a pencil and a caliper. The proof of this particular pudding is the 1.5 moa groups it continues to deliver with either jacketed or cast bullets. curmudgeon
