Peterson Brass 243 Winchester (SR Primer) Unprimed 50/Box
The .243 Winchester SRP 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. If you plan to load above SAAMI max pressure and are concerned about primer-pocket leak, this cartridge is ideal. It is not suggested to loading over SAAMI max pressures, the small primer pocket .243 Winchester have proven to hold up over SAAMI max pressures when tested in the universal receiver.
According to Derek Peterson, president of Peterson Cartridge, “Lots of shooters still use .243 Winchester for long-distance and competition shooting. And many of these shooters want it in Small Rifle primer (SRP). But no one else makes it in SRP. Some shooters are even going to the trouble of buying Lapua .308s in SRP and necking them down to .243. But of course, that causes a doughnut at the base of the neck, requiring the neck to be turned down. Now you can buy Peterson match-grade .243 Winchester in SRP and save the labour.”
Many competitive shooters prefer Small Rifle Primer pockets (SRP) because they experience longer primer pocket life due to the increased material in the head of the case. There is also a belief that Small Rifle Primers produce a more consistent ignition. Some people even report better groupings and lower velocity spreads.
However, the SRP version is not recommended for shooting in extreme cold or hot temperatures. And Small Rifle Primer Brass sometimes requires the firing pin on your gun to be bushed. This depends on your rifle and your bolt. If that is not done, you risk getting pierced primers. For more information on bushing your firing please watch this YouTube video https://www.youtube.com/watch?v=-CDJKLp7BsI.
To make sure you don’t have any problems talk to your gunsmith and understand what your rifle is set up for before using SRP brass. Doing that will make sure your reloading and shooting experience is much more enjoyable.