Lee Precision 350 LEGEND FULL LENGTH SIZING DIE ONLY 91140

A full-length sizing die is designed to resize the entire length of the cartridge case, not just the neck. Unlike neck-sizing dies, which only resize the neck portion, full-length sizing dies are versatile and suitable for any rifle chambered in the same cartridge.

When you fire a cartridge, the brass case expands to fit the chamber of your rifle. After firing, the case contracts slightly, but it may not return to its original dimensions. The full-length sizing die restores the case to the correct dimensions by resizing both the neck and body. It also removes any bulges or irregularities caused during firing.

Setting up a full-length sizing die involves several steps:

• Clean the outside of the fired cases with alcohol and a cloth.
• Zero out the calipers using a headspace comparator and a fired case.
• Install the full-length sizing die and adjust it gradually until the case shoulder is bumped back by 0.001 inch.
• Lock the die and lubricate the cases before sizing them.
• Check the shoulder bump every 10 cases or so and adjust the die if needed.
• Avoid overworking the brass to prevent case head separation.