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The 338 ARC is one of Hornady's newer designs, built around the ARC case that traces back through the 6mm ARC and 6.5 Grendel. It was engineered as a hard-hitting short-range cartridge with heavy .338 caliber bullets, and it really shines in the subsonic world where that fat bore and heavy projectile do their best work. Starting with quality brass is the first step in building rounds that behave the way you want, and this new, unprimed Hornady brass gives you that foundation.
Hornady treats brass as a core part of an accurate cartridge rather than a throwaway component. These cases are measured for consistently tight wall concentricity, run through a pressure calibration test to ensure uniform case expansion during firing, and hand inspected before they ever leave the plant. That attention to detail shows up downstream as more consistent charges, predictable pressures, and brass you can run through multiple load cycles.
Because the 338 ARC was optimized around a small-capacity case, it sips powder. Many subsonic loads land in the neighborhood of nine to ten grains, so precise, repeatable brass volume matters a lot here. Uniform wall thickness and internal capacity help keep your velocities tight, which is exactly what you're chasing when you're tuning a quiet, heavy-bullet load. One thing worth noting before you prep these: the 338 ARC is designed around Small Rifle Magnum primers, not the Large Rifle primers you might expect from a .338 caliber round. It comes down to powder capacity rather than bore size.
This is new, unprimed brass sold as a pack of fifty, ready for you to size, prime, charge, and seat with your chosen components. It is not loaded ammunition. If you're running a 338 ARC and want a dependable starting point for load development or just topping off your supply, this brass is a solid place to begin.
This is new, unprimed brass, not loaded ammunition. You'll need to size, prime, charge with powder, and seat a bullet to build finished rounds. It gives you full control over every component in your load.
The 338 ARC is designed around Small Rifle Magnum primers. Even though it's a .338 caliber cartridge, the small powder capacity dictates the primer size rather than the bore diameter. Loading it with Large Rifle primers would be a mismatch for the case design.
The 338 ARC case was created by shortening and necking up the 6mm ARC, which itself came from the 6.5 Grendel lineage that traces back to the .220 Russian. Hornady built it as a compact, efficient case optimized for heavy subsonic bullets. That small case capacity is a big part of what makes it so quiet and controllable.
Case life depends on your load pressures, resizing habits, and how you prep the brass. Hornady's tight quality control and uniform construction are built to give you more reloads per case than commodity brass. Keeping your charges reasonable and annealing when needed will stretch that number further.
| UPC | 090255868371 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 86837 |
| Caliber/Gauge | .220 Swift |
| Length | 4.6000 |
| Quantity | 50 |
| Shipping Weight | 0.77 |
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