I only neck size for 30-06 and lately I have had a few feel tight in the die and crush the shoulder. Can the case or die be too dirty and then cause sticking allowing the pressure to crush the shoulder? I took the die apart and cleaned it but it didn't look mucked up. Or if it sticks and the shoulder crushes, does this mean the case is at the end of its case life? It only happened with some Starline cases reloaded 7 times.