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Peterson has earned a reputation among precision handloaders, and this 6mm ARC brass shows exactly why. Produced on a state-of-the-art case line, every piece is engineered for consistent wall thickness, uniform internal volume, and matched case weight, which are the little details that pay off when you're chasing tight groups and low velocity spread. This is unprimed brass, so you've got full control over your load from the ground up. The 6mm ARC runs a small rifle primer, and these cases are built around that pocket from the start.
Uniformity is the name of the game here. The case walls, primer pockets, and flash holes are held to tight tolerances so you get repeatable ignition and velocity shot after shot. Peterson anneals during production and cuts their primer pockets slightly tight, which helps the case seal properly on that first firing and keeps pockets holding tension through multiple reloads. The brass tends to run a little heavier and sturdier than some mass-produced options, and reloaders consistently report getting more firings per case with proper care.
The 6mm ARC was designed by Hornady as a low-recoil, high-accuracy round that feeds high-BC .243 bullets through AR-15 platforms and bolt guns, making it a favorite for long-range target work and hunting out to distance. Plenty of folks open a box, chamfer the mouths, prime, and head straight to the bench, since the cases show up clean and concentric with inside-chamfered necks. Each lot ships with traceable lot and QC numbers printed right on the box, so you can track your brass across sessions.
If you're building loads for a 6mm ARC and want a case that delivers sub-MOA potential without fuss, this is proudly American-made brass that competes with the best in the business. It's a solid foundation whether you're punching paper, ringing steel, or filling the freezer.
These cases ship unprimed, giving you full control over primer selection and load development. The 6mm ARC uses a small rifle primer, so the cases are built with a small primer pocket. You'll just need to add your choice of primer, powder, and bullet.
Many reloaders open a box, run a quick chamfer on the case mouths, prime, and go straight to loading. The brass arrives clean, annealed, and concentric with inside-chamfered necks. As with any new brass, giving it a quick inspection and chamfer is good practice before your first load.
Peterson cuts their primer pockets slightly tight so the case seals on first firing and the pocket seats into spec under pressure, which helps pockets stay tight over time. Handloaders routinely report getting more firings per case than typical factory brass when loads are kept reasonable and cases are properly resized. Lifespan always depends on your pressures, sizing habits, and maintenance.
The 6mm ARC was designed by Hornady to run in AR-15 platforms and works equally well in bolt-action rifles chambered for the cartridge. It's popular for long-range target shooting and hunting thanks to its low recoil and high-BC bullet options. This brass gives you a consistent foundation for either platform.
| UPC | 810068271065 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 40074-R |
| Caliber/Gauge | 6mm ARC |
| Length | 5.7000 |
| Shipping Weight | 1.15 |
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