HSM Ammunition Starline Rifle Brass Unprimed Cases 243 Win Caliber 50 Per Bag. 243 Winchester is one of the most popular and versatile cartridges available. Derived from the .308 Winchester the .243's low recoil and flat trajectory make it an excellent all around cartridge. Due to a wide bullet selection being readily available the .243 can be applied just as well on the shooting bench looking over prairie dog town as it can waiting for a whitetail from 15' up a tree. The 243's accuracy potential is excellent making it a popular choice of competitive shooters. Specifications for Starline Brass Unprimed Cases 243 Win Rifle Brass: Manufacturer: HSM Ammunition Gun Type: Rifle Caliber: .243 Winchester Primed: No Quantity: 50 Fabric/Material: Brass Package Contents: Starline Brass Unprimed Cases 243 Win Rifle Brass