Going through a new die set and working on doing large batches of 300 Blackout brass. Coming across a very weird problem. Using the sheridan slotted case gauge. I am trimming the brass near min, in these 2 cases 1.353 was the actual OAL. With this length the case is still sticking out of the top of the gauge past the max length part of it between 4 and 8 thousandths. What could be causing this? If everything was correct then a trim of 1.353 would put it well below max Everything seems fine from looking at the case in the gauge. I have the die cranked very far down during the forming procedure to the point where I do not believe it safe to cam over the press any more. Only thing I can think about is the shoulder needs to move lower on the case but it is not possible since the die isnt going to go any farther down. Using Hornady dies and, for now, a lee single stage to form on. I know the real answer is "shoot it and find out" and that was the game plan for tomorrow. The bolt closes without an issue that I can tell.
Thank you