On another thread Professor Murphy talked about the Lee Factory Crimping Die, emphasizing that the beneficial features of the die may also result in over-work of the case. Since I use the LFCD for many calibers (454 Casull, .45 ACP, 10mm, and .223) his comment caught my eye, and I realized that I may not be up to speed at spotting EARLY signs of metal fatigue.
I understand cracks on the case mouth, shoulder or case head separation...that's time to toss. However, what about EARLY signs that the brass is becoming worn from over-work by the die? How can I tell? Is it a visual discoloration or shininess at those same failure points? Lost Sheep talked about running his finger over the case mouth...are you feeling a crack that you can not yet see? Do I get to buy another new gizzmo that will measure early fatique?
Thanks in advance guys...