.223 Case Length Gauge I was feeling pretty good about my reloads. Every round went bang and accuracy was much better than the factory stuff I'm used to shooting. That is until I picked up a Dillon Case length gauge. It looks like I have been pushing the shoulder back slightly too far. I set my RCBS FL dies just as instructed. Decapping pin set 3/16" proud. Screwed sizing die down until it touched the shell holder and then tightened 1/8-1/4 turn. I felt the "Camming action". I'll probably continue to use them, but will be backing off die.