Peterson SRP (Small Rifle Primer) Unprimed Brass 6.5x47 Lapua is crafted to match-grade standards, providing some of the most consistent and durable brass rifle casings available. Each box includes 50 unprimed casings tailored for precision reloading. All SRP casings feature a small flash hole measuring 0.060 inches, which is different from the 0.080-inch flash hole found in large rifle primer casings. This design requires an X-small/Undersized Decapping Pin for depriming.