I haven't thought about my carbide sizing dies in probably 35 years, except when setting up a die (I don't want to run it into the shell holder and possibly crack it). I have no idea how many 9mm cases have been sized with my Lee dies ( last week I sized 500 and have about 2,000 JIC rounds and maybe 500 handloads waiting to be fired, and that's just in the last year). When I get tired or size some tougher cases (hot loaded 44 Magnums) I'll put a dab of lube on my finger every 10th round or so).
Yes, the 9mm carbide die use a straight carbide ring, and yes, the 9mm case is tapered, but in the many thousands of rounds I've reloaded, not a single problem related to these two facts...
Last edited by mikld; 09-12-2021 at 12:24 PM.
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