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The 6mm GT has earned its spot as one of the go-to cartridges in precision rifle competition, and Peterson Cartridge makes some of the best brass going for it. These are unprimed cases packed 50 to a box, built on Peterson's state-of-the-art case line to match-grade standards. If you're loading for PRS, NRL, F-Class, or just chasing small groups off the bench, this is the kind of foundation that lets your load development pay off.
Peterson is a family-owned American manufacturer out of Pennsylvania, and brass is all they do. That focus shows up in the details reloaders care about: tight weight tolerances, uniform wall thickness, good concentric necks, and consistency from one lot to the next. The cases are annealed for uniform neck tension and longer case life, so you can expect a solid number of reloads per piece before they give up. The 6mm GT runs a small rifle primer pocket, which is part of what gives this cartridge its reputation for clean, consistent ignition.
The 6mm GT was a 2019 project from George Gardner of GA Precision and Tom Jacobs of Vapor Trail, designed from the ground up for competition. The goal was Dasher-level accuracy and mild recoil in a case that feeds flawlessly from AICS-pattern magazines, with a slightly longer body and neck for seating flexibility. It uses forgiving powders like Varget and H4350, gives good barrel life, and pushes 105 to 107 grain match bullets into the 3,000 fps range with excellent external ballistics. That combination of low recoil, easy load development, and reliable feeding is exactly why it took off on the match circuit.
Peterson's 50-count boxes come in a sturdy, reusable plastic ammo box that actually holds up on the bench and in the range bag. Lot numbers are printed on the box, which makes it easy to keep your batches organized if you buy brass regularly. Grab a box, prep them your way, and get to load tuning.
It uses a small rifle primer pocket, which is standard for the 6mm GT cartridge. The small primer pocket is part of why the 6mm GT has a reputation for consistent ignition and good accuracy. Make sure you pick up small rifle primers for your load, not large rifle.
These are brand new, unprimed cases. You'll need to prime, charge, and seat bullets as part of your normal handloading process. Many reloaders also like to run their standard prep, such as checking case length and sizing, before the first firing.
The 6mm GT was designed specifically for precision rifle competition like PRS and NRL, and it has carved out a spot in F-Class and benchrest too. It offers low recoil, good barrel life, and excellent external ballistics with 105 to 107 grain match bullets, and it feeds reliably from AICS-pattern magazines. If you're building or running a dedicated match rifle, it's a strong choice.
Peterson builds its brass to get more reloads per case than the industry average, and the cases are annealed to help neck tension stay consistent and extend case life. Actual case life depends on your pressures, your sizing practices, and how hot you run your loads. Keeping loads reasonable and sizing carefully will get you the most trips to the range per case.
| UPC | 810068271232 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 40076-R |
| Caliber/Gauge | 6MM GT |
| Length | 5.7500 |
| Quantity | 50 |
| Shipping Weight | 1.5 |
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