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9 mm Dillon carbon sizer question

Awhile back, like maybe 20 years or so, Dillon sent me an offer to receive a new 9mm carbide sizing die - free! - to replace the original one received in my original 9mm carbide die set.  I received the new die, but I can no longer recall the circumstances for the offer, other than there was a cartridge size change needed to correct each casing to the standard drop-test size. Dillon did not request that the old die should be returned.

Of course, this got mixed up with the die set, and now I am not certain how to ID it other than to look for the constricted seated bullet outline after a reload.  I failed to band the original die with a piece of blue masking tape.

Can anybody enlighten me on this?  Are there others who got this same offer?

 

Thanks  Jack

In your case, the wrong carbide ring was installed into the size die body. You would have to use pin gages to determine the various sizes of the opening to determine what die is correct.

Your best bet would be take both and resize a case and measure both with your calipers and that should tell you which one is sizing the case correctly.

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