Description
If you like to deprime your brass before anything else happens at the bench, the L.E. Wilson Decapping Base Only .475 is the piece that makes that possible. This is the base portion of Wilson's punch-and-base decapping system, sized to cradle case heads that measure right around .473 to .475 inches. It cups the case securely and leaves a hollow reservoir underneath where the old primers drop away, so you can knock out primers with a few taps instead of running every case through a die and press.
Where the .475 Decapping Base Fits
This particular size is built around the .308 Winchester cartridge family, which covers a healthy spread of popular rounds including .243 Winchester, .260 Remington, 7mm-08 Remington, .338 Federal, and .358 Winchester. All of those share a similar case head diameter, so one base handles the whole group. Wilson's rule of thumb is simple: measure your case head diameter and match it to the base size. The decapping punches are sold separately and are caliber specific, with the 30 caliber punch covering everything 30 caliber and up.
Why Reloaders Reach for the Wilson Punch and Base System
Plenty of precision handloaders prefer to pull primers as a standalone operation before sizing, and that is exactly what this tool is made for. It also shines on range brass and once-fired military cases, since it muscles out crimped-in primers that can fight a standard decapping pin. Doing it this way means you can deprime dirty brass first, then run it through the tumbler or ultrasonic cleaner with the primer pockets open so they come out spotless.
The base is case hardened for wear resistance, so it holds up to repeated hammering over the long haul. Like the rest of the Wilson lineup, it is made in the U.S.A. and built to the kind of tolerances benchrest crowd has trusted for years. Pair it with the correct punch for your caliber and you have a straightforward, dependable way to handle depriming away from your press.
Key Specifications
- Manufacturer: L.E. Wilson
- Manufacturer Part Number: PBB-475
- UPC: 815145025654
- Base Diameter: .475 in
- Cartridge Family: .243 Win, .260 Rem, 7mm-08 Rem, .308 Win, .338 Federal, .358 Win
- Material Finish: Case hardened for wear resistance
- Component: Base only (punch sold separately)
- Country of Origin: Made in U.S.A.
- Shipping Weight: 0.3 lb
What’s Included
- L.E. Wilson Decapping Base Only .475 (PBB-475)
Frequently Asked Questions
Does the Wilson Decapping Base .475 come with a punch?
No, this is the base only. The decapping punches are caliber specific and sold separately, so you will want to pair this base with the correct punch for your cartridge. For anything 30 caliber and up, Wilson recommends the 30 caliber punch.
Which cartridges work with the .475 decapping base?
The .475 size is built around the .308 Winchester case head family. That includes .243 Winchester, .260 Remington, 7mm-08 Remington, .308 Winchester, .338 Federal, and .358 Winchester. The quickest way to confirm fit is to measure your case head diameter and match it to the base size.
Can this remove crimped military primers?
Yes, that is one of the strengths of the Wilson punch and base setup. It drives out crimped-in primers that often give standard decapping pins trouble. A lot of folks use it specifically to deprime once-fired military brass before cleaning.
Why deprime with a base instead of a sizing die?
Many precision handloaders prefer to punch primers out as a separate step before sizing. Doing it this way lets you deprime dirty brass first, then tumble or clean it with the primer pockets open so they come out clean. It also keeps your sizing die from getting gunked up with fouling.




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