I don't know of any other source for CARBIDE .223 dies
than Dillon. It pained me to do it (especially because, while I hemmed and hawed, the price went up), but I coughed up the bucks for the Dillon sizing die.
I already had a full .223 die set; if you haven't gotten any dies, a full Dillon set may be even more efficient. Anyhow, I use the carbide die in the Rock Chucker to size and deprime the cases. It's an extra step, but really reduces case stretch and wear. I also use the spray sizing lube sparingly; no messy lube pads for me! Even carbide needs some lube on rifle cases.
I then run the cases through the 550, using the conventional die set and a Lee crimping die, set rather light.
Good luck!
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