NORMA ONCE-FIRED 7 X 64 Brenneke ( 7 x 64 mm ) unprimed brass rifle shell cases. Cases have been media tumbled only.
Note: Please inspect used brass prior to use to verify cases are free from defects. The goal of Duck Creek is to sell only quality components, unless noted in the description we do not know how many times brass has been previously fired. Used brass sold “AS IS’, three day inspection periods are granted, buyer is responsible for shipping charges
History: The 7 x64 mm (unofficially known as the 7 x 64 Brenneke) was designed in 1917 by Wilhelm Brenneke (1865-1951) of Germany. The parent case is the 8x64mm S with a narrowed neck to fit a .285 inch bullet on a .313 inch neck. The case is a rimless, bottleneck with a 1:8.66 twist and a large rifle primer. The case length is 2.52 inches with overall length of 3.307 inches and can fit a maximum load of 69 grains.
The ballistic performances based off three grain types for muzzle velocity on the 7×64 Brenneke are 3,000 ft/s (123 gr SP), 2,900 ft/s (154 gr SP), and 2,700 ft/s (174 gr SP.) The 7x64mm was a commercial success after it went onto the public market in 1917 due to its ability to achieve up to 12-percent more muzzle velocity over the 7x57mm with a flatter trajectory and better long range shooting performance.
Brass case mouths MAY not be perfectly round from the manufacturing process, this can be corrected by running brass through the size die (always recommended) prior to loading. Residue from the annealing process may leave a stain on the case neck that can be removed by tumbling. Annealing involves rapid heating then cooling to impart the shell cases with the proper hardness to securely hold bullets in place and provides flexibility to expand and contract through multiple firings handloaders expect.