The RCBS Neck Expander Die in .311 caliber (brand part no. 39823) is a complete expander die built to flare the inside of a resized case neck to just slightly more than the actual bullet diameter, so a bullet seats perfectly straight every time. RCBS machines this die from high-quality steel and backs it with a lifetime guarantee, and the complete unit includes a neck sizer with a combined expander/decapping assembly plus a plastic storage case. Home reloaders working up precision .311-caliber loads use this die specifically to correct neck alignment before bullet seating, a step that directly affects concentricity and accuracy at the bench. It ships as a single complete die.

Key Specifications

• .311 caliber expander die, sized specifically for this bullet diameter.
• Complete Die configuration includes the neck sizer with expander/decapping unit in one piece.
• High-quality steel construction backed by an RCBS lifetime guarantee.
• Flares the case neck to just over bullet diameter for straight, consistent bullet seating.
• Includes a plastic storage case for the die.
• Ships at roughly 0.7813 lb for handloaders planning bulk die-set orders.

Frequently Asked Questions

What does a neck expander die do? It flares the inside of a resized case neck to just slightly more than the bullet’s actual diameter, so the bullet seats straight and aligns perfectly during the loading process.

What is included with this die? A complete neck sizer with a built-in expander/decapping unit, plus a plastic storage case.

Buy the RCBS Neck Expander Die, .311 Caliber

Order this RCBS .311-caliber Neck Expander Die from our reloading dies selection to true up case necks before bullet seating. Order from our Lubbock, Texas gun shop for fast, insured shipping nationwide.