The Hornady 300 AAC Blackout Full-Length Sizing Die (Hornady part no. 046459) is a full-length sizing die for 300 AAC Blackout brass. Made by Hornady, a longtime staple on the reloading bench of handloaders who work up their own precision ammunition. This die is machined to fit standard reloading press threads and drops straight into your existing die set for 300 AAC Blackout cases. Handloaders sizing, expanding, seating, or crimping 300 AAC Blackout brass for hunting, competition, or range practice rely on dies like this one for round-to-round consistency that factory ammunition can’t always match. It’s built for the reloading bench, not the range bag, and belongs in the toolbox of anyone loading their own 300 AAC Blackout ammunition.

Key Specifications

• 300 AAC Blackout is the cartridge this die is machined to size, expand, seat, or crimp.
• Full-Length Sizing Die function: this die resizes the full case body, shoulder, and neck back to SAAMI spec, the standard choice for ammunition that has to chamber reliably in more than one rifle.
• Precision-machined internals: an integral decapping pin and expander ball punch out the spent primer and resize the neck ID in the same pass as body sizing.
• 7/8-14 threaded die body drops into any standard single-stage, turret, or progressive press without an adapter.
• Precision-machined steel construction holds tight tolerances through years of repeated reloading sessions.

Frequently Asked Questions

What does this full-length sizing die do? Resizes the full case body, shoulder, and neck back to SAAMI spec, the standard choice for ammunition that has to chamber reliably in more than one rifle.

Does this die deprime the case? Yes, the integral decapping pin punches out the spent primer in the same stroke that resizes the body and neck.

Buy the Hornady 300 AAC Blackout Full-Length Sizing Die

Order the Hornady 300 AAC Blackout Full-Length Sizing Die from our Lubbock, Texas gun shop for fast, direct shipping to your reloading bench. Browse our full lineup of reloading dies to round out your press setup for 300 AAC Blackout handloads.