Peterson Brass .308 Winchester (7.62 X 51) Unprimed 50/Box
Peterson .308 Winchester Match Grade Cartridge is manufactured on Peterson Cartridge’s new, state-of-the-art case line which uses cutting-edge technology to produce some of the most precise and consistent casings on the market. Peterson Cartridge Co is committed to producing Match-Grade Brass that enables the customers to get more reloads per casing than industry average.
Recently Peterson's ballistician had some extra time in his schedule, and asked what he should work on next. They said, “Just for the heck of it, see how many times you can fire our .308s before you experience failure.” So that’s what he set out to do.
He took five .308 Winchester casings out of inventory and loaded them at SAAMI max pressure, which is the pressure Peterson use for all of their longevity testing. It is a hot load, and he did the firing out their our Universal Receiver. This way he could measure pressures and velocities each shot. He shot all five, 20 times. (It takes a long time to do that. Load five casings. Shoot five times. Back into the lab to reload, back into their indoor range to shoot, back into the lab, and so forth.)
After 20 firings with no sign of case deterioration he asked if he should keep going. They said, “Sure, let’s see how long these can go.” So he shot them five more times. Same result. All casings still in good shape. They told him to keep going. He shot each of them six more times. At this point each of the five casings had been fired 31 times. After several days of this the casings were still in good shape but we were experiencing “ballistician fatigue.”
Finally he said, “Let me take these cases to the outdoor range and see how they do for accuracy.” They agreed.
For the 32nd firing he used a lighter load. The gun he used was a Tikka T3 bolt action, 20 inch barrel with a 1:11 rate of twist. He put five shots in three tight holes at 100 yards on a somewhat windy day.
After 32 firings of Peterson .308 Win the primer pockets opened about 0.001 of an inch but were still tight enough for further use. There were no cracks or signs of head separation.