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Peterson Cartridge .375 CheyTac unprimed brass is the case to reach for when you're building loads meant to stretch way past a mile. This is match-grade 9.5×77 brass made in the USA, drawn and finished on Peterson's modern case line with the kind of attention to dimensional consistency that separates good brass from great brass. The headstamp carries both the imperial and metric markings, so there's no second-guessing what you're pulling off the bench.
Peterson has a story worth knowing here. Before they stepped in, .375 CheyTac brass was tough to find and came from a single overseas source that was often out of stock. CheyTac actually reached out to Peterson back in 2015 to develop tooling for the .375 and .408 cases, and the brass hit the market in 2016. Since then it's stayed in production and in stock, which is a big reason the caliber has seen a real resurgence among extreme long-range crowd. The .375 is the necked-down sibling of the .408 CheyTac, trading a little bore diameter for flatter trajectories and softer recoil.
Every Peterson case is annealed for uniform neck tension and longer life on the press. The brass is known for tight weight consistency, uniform internal volume, and precisely formed primer pockets and flash holes, all of which help knock down your extreme spread and standard deviation on the chronograph. With proper care, reloaders routinely report getting more firings per case than the industry average, and this brass resizes smoothly without fighting you in the die.
This isn't bench-rest-only brass sitting on reputation. Peterson .375 CheyTac was behind a King of 2 Mile win in 2017, ringing steel at a full two miles, and the caliber itself holds a place in the record books for some of the longest confirmed shots ever made. If you're loading for ELR competition or just want to see what your rig can do at distances most folks never attempt, this is a solid foundation to build on.
These are unprimed cases, so you'll be seating your own primers as part of your load workup. They take large rifle magnum primers. The necks come annealed from the factory, so they're ready to prep and load without any extra softening on your end.
Peterson builds match-grade brass with the goal of more reloads per case than the industry average, and reloaders across their calibers commonly report well into the double digits with proper care. Case life always depends on your load pressure, sizing practices, and how often you anneal. Keep your charges reasonable and these cases will reward you with plenty of trips through the press.
The .375 CheyTac is the necked-down version of the .408 CheyTac, which is its parent case. The .408 was developed as a military round and still sees military use, while the .375 has become the favorite among American extreme long-range shooters. The smaller bore gives you flatter trajectories and a bit less recoil, which is why it's so popular for shots reaching past a mile.
Peterson marks these cases with both the imperial (.375 CheyTac) and metric (9.5×77) designations. That's handy because many shooters and overseas users know the cartridge by its metric name. It takes the guesswork out of identifying your brass on the bench.
| UPC | 859449006056 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 40021-R |
| Caliber/Gauge | .375 Cheytac |
| Length | 7.8000 |
| Quantity | 50 |
| Shipping Weight | 3.25 |
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