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RCBS
The RCBS Small Base Die Set for .30-06 Springfield is purpose-built for reloaders working with semi-automatic, pump, and lever-action rifles that chamber this cartridge. If you've noticed tight groups of cases that don't resize quite right with standard dies—or if your bolt doesn't chamber reloads smoothly—this two-die set solves that problem by resizing cases to smaller dimensions than SAAMI spec, reducing both shoulder and body by a few thousandths of an inch.
That small-base approach matters. Tight-chambering actions can reject rounds sized to full spec, and even slight friction during feeding eats your velocity and confidence. This set brings fired cases down to dimensions that chamber reliably in finicky semi-autos and other firearms with minimal headspace tolerance. You get the Small Base Sizer with integral Expander-Decapping Unit, which sizes and de-primes in one stroke, plus a Regular Seater Die fitted with a roll crimper to lock your bullet in place as you seat it.
The roll crimp is built in and engaged by default—a smart design for ammunition that may encounter feeding stress in semi-automatic actions. If you ever want to seat bullets without crimping, simply unscrew the seater die until the crimp ring disengages from the case mouth. That flexibility means this set will serve your needs whether you're load-developing on the bench or refining hunting rounds for the field.
| Cartridge | .30-06 Springfield |
| Die Type | Small Base Sizer with Expander-Decapping Unit + Regular Seater Die |
| Number of Dies | 2 |
| Crimp Type | Roll crimper (built-in, adjustable) |
| Intended Use | Semi-automatic, pump, and lever-action rifles |
Small-base dies resize cases to dimensions smaller than SAAMI spec—reducing the shoulder and body by a few thousandths of an inch. This is critical for tight-chambering actions, especially semi-automatics, where standard-sized cases may not chamber reliably. If your rifle has minimal headspace or you've had feeding issues with reloaded ammunition, a small-base die set ensures your rounds fit snugly.
Yes. Though designed with semi-autos, pumps, and levers in mind, you can use this set for any .30-06 rifle. Standard bolts with looser tolerances will chamber small-base ammo without issue. The smaller dimensions simply guarantee fit in the most demanding chambers.
The roll crimper is built into the seater die, but you don't have to use it. Unscrew the die until the crimp ring no longer engages the case mouth, and you'll seat bullets without crimp. This gives you the flexibility to load a variety of ammunition configurations from a single set.
Two dies: a Small Base Sizer with Expander-Decapping Unit and a Regular Seater Die with Seater Plug and integral roll crimper.
RCBS
The RCBS Small Base Die Set for .30-06 Springfield is purpose-built for reloaders working with semi-automatic, pump, and lever-action rifles that chamber this cartridge. If you've noticed tight groups of cases that don't resize quite right with standard dies—or if your bolt doesn't chamber reloads smoothly—this two-die set solves that problem by resizing cases to smaller dimensions than SAAMI spec, reducing both shoulder and body by a few thousandths of an inch.
That small-base approach matters. Tight-chambering actions can reject rounds sized to full spec, and even slight friction during feeding eats your velocity and confidence. This set brings fired cases down to dimensions that chamber reliably in finicky semi-autos and other firearms with minimal headspace tolerance. You get the Small Base Sizer with integral Expander-Decapping Unit, which sizes and de-primes in one stroke, plus a Regular Seater Die fitted with a roll crimper to lock your bullet in place as you seat it.
The roll crimp is built in and engaged by default—a smart design for ammunition that may encounter feeding stress in semi-automatic actions. If you ever want to seat bullets without crimping, simply unscrew the seater die until the crimp ring disengages from the case mouth. That flexibility means this set will serve your needs whether you're load-developing on the bench or refining hunting rounds for the field.
| Cartridge | .30-06 Springfield |
| Die Type | Small Base Sizer with Expander-Decapping Unit + Regular Seater Die |
| Number of Dies | 2 |
| Crimp Type | Roll crimper (built-in, adjustable) |
| Intended Use | Semi-automatic, pump, and lever-action rifles |
Small-base dies resize cases to dimensions smaller than SAAMI spec—reducing the shoulder and body by a few thousandths of an inch. This is critical for tight-chambering actions, especially semi-automatics, where standard-sized cases may not chamber reliably. If your rifle has minimal headspace or you've had feeding issues with reloaded ammunition, a small-base die set ensures your rounds fit snugly.
Yes. Though designed with semi-autos, pumps, and levers in mind, you can use this set for any .30-06 rifle. Standard bolts with looser tolerances will chamber small-base ammo without issue. The smaller dimensions simply guarantee fit in the most demanding chambers.
The roll crimper is built into the seater die, but you don't have to use it. Unscrew the die until the crimp ring no longer engages the case mouth, and you'll seat bullets without crimp. This gives you the flexibility to load a variety of ammunition configurations from a single set.
Two dies: a Small Base Sizer with Expander-Decapping Unit and a Regular Seater Die with Seater Plug and integral roll crimper.
