Description
The 6×47 Lapua started life as a wildcat, formed by necking a 6.5×47 Lapua case down to 6mm. It earned a loyal following among precision folks for its low recoil, flat trajectory, and reputation for being easy to find an accurate load for. The catch was always sourcing good brass without doing the neck-down work yourself. Peterson solved that by making factory 6×47 Lapua cases that are properly headstamped and ready to load, so you can get straight to the bench instead of running cases through an intermediate sizing step.
What Sets This Peterson 6×47 Lapua Brass Apart
Peterson runs their casings through a 16-step manufacturing process with heavy quality monitoring from start to finish. The goal is match-grade uniformity in case walls, primer pockets, and flash holes, which translates to more repeatable ignition and velocity on the firing line. The 6×47 case uses a standard .308 Winchester bolt face and feeds reliably through detachable magazine systems, which is a big part of why it shows up in tactical matches, F-Class, benchrest, and long-range varmint rigs. The 6mm bullet selection is deep, so you can load it for paper or for prairie dogs with equal ease.
A Note on the SRP Design
This is the SRP version, meaning small rifle primer pockets. Peterson's SRP cases use a smaller 0.060-inch flash hole compared to the 0.080-inch hole in their large rifle primer line. The small primer setup is one of the reasons the 47mm Lapua family is known for low standard deviation in muzzle velocity, which is exactly what you want when you're stretching things out past 600 yards.
Keep This in Mind Before Reloading
Because of that tighter flash hole, you'll need an X-small or undersized decapping pin to deprime these Peterson 6×47 Lapua cases. A standard pin won't fit. It's an easy swap, and worth knowing before you sit down to process a fresh batch. Made in the USA, packaged 50 to a box in a protective plastic case.
Key Specifications
- Manufacturer: Peterson Cartridge
- Cartridge: 6×47 Lapua
- Bullet Diameter: .243 inch (6mm)
- Primer Size: Small Rifle Primer (SRP)
- Flash Hole Diameter: 0.060 inch
- Bolt Face: .308 Winchester
- Condition: New, Unprimed
- Quantity: 50 per box
- Material: Brass
- Country of Origin: Made in USA
- Manufacturer Part Number: 40035-R
- UPC: 850005375302
What’s Included
- 50 unprimed 6×47 Lapua SRP brass cases
- Peterson plastic ammo storage box
Frequently Asked Questions
Do I need a special decapping pin for this Peterson 6×47 Lapua SRP brass?
Yes. Peterson's SRP cases have a smaller 0.060-inch flash hole, so a standard decapping pin won't pass through cleanly. You'll want an X-small or undersized decapping pin to deprime these cases without bending the pin.
What's the advantage of the SRP version over large rifle primer brass?
The small rifle primer design is one of the big reasons the 47mm Lapua case family is known for low standard deviation in muzzle velocity. That consistency pays off when you're shooting at distance, where small velocity swings open up vertical spread on target. It's a popular choice among precision and long-range reloaders for exactly that reason.
Is this brass ready to load, or do I have to neck it down first?
This is factory-made 6×47 Lapua brass, so it's already at 6mm and properly headstamped. You skip the whole process of necking down 6.5×47 Lapua cases yourself. Just run it through your normal prep and sizing routine and you're ready to load.
What bolt face does the 6×47 Lapua use?
The 6×47 Lapua uses a standard .308 Winchester bolt face. The case shares a base diameter and length close to the .308, which means it works with common bolt heads and feeds well through similar actions and magazine systems.





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