17. Part 5, Lee Factory Crimp Die and Tolerance Stacking

We gotta think about the tolerances! You may be surprised about how the thickness of brass cases can vary from brand to brand and even lot to lot. This video is not "empirical", but anecdotal. This is a small sample of cases and measurements but it should be enough to allow one to realize that differences in tolerances can lead to stacking issues. The way tolerances stack can cause problems with the FCD. Lets explore this phenomenon!