Pre-stressing Full Length Sizing Dies

Q. I own a set of your 300 AAC, 223, and 6mm dies. I recently bought three new Full Length Sizers in those calibers. Side by side, the newer dies are longer than the older sizing dies. Can you tell me why the change in length?

A. All our dies that used to have a 2 ½” blank for the die body are now made to 2 5/8”. There are several other calibers that now have a longer die body. This improvement allows for more thread engagement with the lock ring on certain reloading presses. It is especially useful for Dillon’s 650 Reloading Press and Whidden aftermarket shell plates.

Posted in: Reloading Dies FAQs