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The 280 Ackley Improved earned its reputation by taking the already capable 280 Remington and blowing the shoulder out to 40 degrees, giving you more powder room, flatter trajectory, and velocities that creep right up near the 7mm Rem Mag with light to mid-weight bullets. Peterson Cartridge builds brass worthy of that case, and these 280 AI unprimed casings are the foundation for a handload you can trust shot after shot. The brass arrives unprimed and ready for your prep routine, headstamped .280 Ack Imp, with a large rifle primer pocket.
Peterson is a family-owned American manufacturer, and every casing moves through a 16-step process that's monitored hard from the production line to quality control. The result is the kind of uniformity reloaders obsess over: consistent case walls, clean and uniform flash holes, and primer pockets that seat snug. Folks running these have reported weight variation of less than a grain across a full box, which tells you a lot about how tight the tolerances are.
The 280 AI thrives on a stout powder charge, and Peterson designed this brass with an ultra-hard head and a thicker web so it tolerates high pressure and gives you more reloads per case. That durability pays off over time. Reloaders have pushed this brass through impressive firing counts with heavy 7mm bullets while the primer pockets stayed tight, which is exactly what you want when you've invested time into load development.
If you're building loads for long-range hunting or ringing steel at distance, this is premium component brass that holds its own against the best on the market. The 280 Ackley is the rare wildcat that went mainstream and earned a SAAMI spec, so it sits in a sweet spot between the 270 Winchester and the 30-06 with heavier bullet options and a flatter arc. Start with brass this consistent and you take a big variable off the table before you ever touch the powder measure.
These casings use a large rifle primer pocket, which is standard for the 280 Ackley Improved. You'll want large rifle primers on hand when you start your load workup. The brass ships unprimed so you have full control over your component choices.
It arrives new and unprimed, ready for your normal prep routine. Reloaders consistently report the flash holes are uniform and the primer pockets seat snug with very little case-to-case weight variation. Many run it with just a light prep, though a quick check of case length and a chamfer never hurts before that first load.
You can fire-form 280 Remington cases in a 280 AI chamber, but starting with purpose-built Peterson 280 AI brass saves you that step and gives you uniform, match-grade cases from the jump. The Peterson brass is headstamped .280 Ack Imp and built with a thicker web to handle the higher pressures the cartridge runs. For serious accuracy work, dedicated brass is the way to go.
Peterson designed this brass with an ultra-hard head and thicker web specifically to tolerate high pressure and give you more reloads per case. Users have reported running well over 20 firings with heavy bullet loads while the primer pockets stayed tight. Your actual case life depends on your loads, sizing practices, and how well you care for the brass.
| UPC | 810068271171 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 40011-P |
| Length | 10" |
| Quantity | 250 CT |
| Shipping Weight | 8.1 |
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