The RCBS Small Base Die Set for .30-06 Springfield (RCBS part no. 14803) is built for handloaders feeding tight-chambering semi-automatic, pump, and lever-action rifles, where a standard full-length die doesn’t always resize enough to guarantee reliable rechambering. This two-die set pairs a Small Base Sizer Die with an integrated expander-decapping unit and a Seater Die with a built-in roll crimper, so .30-06 Springfield brass gets sized down and reloaded ammunition gets seated and crimped in the same tooling. It’s a practical choice for reloaders who run gas guns hard and need cases that chamber every time, not just most of the time.

Key Specifications

• Chambered specifically for .30-06 Springfield, matching the die dimensions to this cartridge.
• The Small Base Sizer Die resizes the case body and shoulder a few thousandths below SAAMI-minimum spec, tighter than a standard full-length die.
• That extra sizing is built for tight-chambering semi-automatic, pump, and lever-action rifles that need guaranteed rechambering.
• The sizer die’s expander-decapping unit removes the spent primer and expands the neck in the same stroke.
• The Seater Die includes a seater plug and a built-in roll crimper to lock the bullet in place as it seats.
• The crimp can be backed off by unscrewing the seater die until the crimp ring clears the case mouth, for reloaders who prefer to seat without crimping.
• Both dies use the industry-standard 7/8-inch-14 thread, fitting any single-stage, turret, or progressive press.
• As a conventional steel (non-carbide) die, cases should be lubricated before sizing to prevent a stuck case.
• The set is a complete two-die kit, covering sizing and seating for this cartridge in one box.

Frequently Asked Questions

Why use a small base die instead of a standard full-length die? A small base die sizes .30-06 Springfield brass down slightly more than a standard full-length die, which helps fired cases rechamber reliably in tight-chambering semi-automatic, pump, or lever-action rifles.

What’s included in the set? A Small Base Sizer Die with expander-decapping unit and a Seater Die with seater plug and built-in roll crimper.

Do I need to lube cases before sizing? Yes. This is a conventional steel die, not carbide, so cases need to be lubricated before running them through the sizer.

Buy the RCBS Small Base Die Set – .30-06 Springfield

If your semi-auto or pump gun has ever balked at rechambering handloaded brass, the RCBS Small Base Die Set for .30-06 Springfield solves that with tighter sizing built for exactly that problem. Order it from RCBS and browse the rest of our reloading dies from a Lubbock, Texas gun shop for fast, insured shipping.