Old Syko,
I agree that things definitely wear out! Many years ago, I drilled on mining operations using a diamond bit (diamonds embedded into the steel core tip) and they would wear, but mostly they got lost because the metal in the core tip got hot and released the diamonds.
I don’t doubt you need to replace your carbide teeth on your grinding drum after some use. BUT, how many times are these teeth in contact with material they are grinding before they need replaced? OR, I wonder how many cases must be inserted into a carbide die to be equivalent to the wear and tear your carbide teeth get in 16 hours? How many revolutions does the drum make in that amount of time? Betcha that’s lots and lots of cases run into a carbide die equivalent? I still think it would take much abuse to ruin a carbide sizing die, or to scratch it, or to wear it to the point where it doesn’t size cases. Just my thoughts…BCB