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Peterson 338 Lapua Casing Box of 50 PCC338LP


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Peterson Cartridge is a family-owned, American manufacturer of match-grade, brass rifle casings and loaded ammunition that is among the most precise and consistent on the market, delivering discerning long-distance shooters sub-MOA accuracy. Peterson brass casings are manufactured using a state-of-the-art case line that uses cutting-edge technology to produce some of the most consistently precise casings available.

Every Peterson brass casing goes through a 16 step manufacturing process that is heavily monitored to ensure that every Peterson casing meets the standards required of their customers. The end of Peterson’s manufacturing and inspection process results in a product that provides two things every serious reloader needs during load development: accuracy and precision. Peterson brass is designed, produced, and tested by shooters for shooters in the USA.


  • Item ConditionNew
  • Caliber:.338 Lapua Mag
  • Product TypeUnprimed Brass
  • Primer Pocket SizeLarge Rifle Primer
  • UPC859449006025
  • MPN40005R

Customer Reviews

Average Rating
April 29, 2018

This is the first time I’ve used Peterson Brass. The brass comes nicely packaged in a plastic case (like an MCM) that I will be able to use to carry loaded rounds. A friend of mine recommend Peterson brass. I typically use Norma or Lapua for this caliber. The cases appear to be well made and uniform from case to case. The primer pockets are a little tight. I use Federal GMM 215 primers and I cannot always get the primers to seat flush. This makes it difficult to slide the cases in and out of the shell holder. It is for this reason only that I gave product 4 stars. I’ve only reloaded them once and wondering if this issue will go away with time. I typically load at the maximum or slightly below ( depending on group consistency) to get maximum velocity. I anneal my cases every time and typically get 8+ reloads from my brass. I expect to get similar results with Peterson brass. I shoot a 300 gr Berger Hybrid Target. I got a one hole 5 shot group that was slightly larger diameter than the bullet using 91.5 gr H1000 with ogive is 0.001” from lands. Maximum load is 92gr H1000 (according to Hodgdon website). No signs of pressure.

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