According to Derek Peterson, president of Peterson Cartridge, “I went online to look for high-pressure loads that handloaders are using for 28 Nosler. Specifically, I was looking for loads that were fast and hot. I found a few shooters who are using a load that is close to SAAMI Proof pressure (33% higher than max pressure). Using that load, we loaded up some of our Peterson casings as well as casings from the other leading brands.”
Peterson continued, “We used the same load in the Peterson brass and the competitor’s brass. Bullets were seated to the same depth in both, and muzzle velocities were within 3 fps of each other.”
Testing showed a pronounced plunger mark on the competitor’s brass, but no mark on the Peterson casing. Other signs of overpressure in the competitor brands tested included blown primers and very heavy bolt lift. The primers in the Peterson 28 Nosler brass held fine, and the bolt lift was normal. With one of the rival brands, the case head was so soft you could read the headstamp on the bolt face after it was fired.
The designers at Peterson are smart about brass grain structure and webbing thickness, and they use that to design casings which:
- hold more pressure
- get more reloads
- have longer primer pocket life
The 28 Nosler is a great long-distance big-game calibre that takes advantage of the newer, high BC, 7mm bullets.
Warning: Only use Peterson Cartridge Co. casings in firearms in good condition, designed, marked, and chambered for this cartridge. Do not use Peterson Cartridge Co casings for “fire forming” or any other purpose other than what they were designed and tested for. Peterson retains no responsibility for the enclosed casings if they are used outside of the manufacturer’s recommendations.