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Generally, only new, unfired .223 Remington brass is used for handloading TCU cartridges to avoid the premature case neck splits that can occur when resizing previously-fired .223 Remington brass with TCU reloading dies. Done this way, TCU sized brass generally becomes as reliable for multiple reloadings as any other handgun cartridge case.
The head of a brass case can be work-hardened to withstand the high pressures, and allow for manipulation via extraction and ejection without rupturing. The neck and body portion of a brass case is easily annealed to make the case ductile enough to allow reshaping so that it can be handloaded many times, and fire forming can help accurize the ...
The brass suppliers or cartridge manufacturers would sometimes have the brass batch or cartridge lot number to the right of their code letter. The post-war headstamp had the manufacturer code (AI / EMZ or NWM) at the 6 o'clock position. AI Artillerie Inrichtingen NV ("Artillery Factories") (1679–1983) – Zaandam-Hembrug, Netherlands ...
The .223 Remington (designated 223 Remington by SAAMI [4] and 223 Rem. by the C.I.P., [5] pronounced "two-twenty three") is a rimless, bottlenecked, centerfire intermediate cartridge. It was developed in 1957 by Remington Arms and Fairchild Industries for the U.S. Continental Army Command of the United States Army as part of a project to create ...
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Components of a modern bottleneck rifle cartridge. Top-to-bottom: Copper-jacketed bullet, smokeless powder granules, rimless brass case, Boxer primer.. Handloading, or reloading, is the practice of making firearm cartridges by manually assembling the individual components (metallic/polymer case, primer, propellant and projectile), rather than purchasing mass-assembled, factory-loaded ...
The first French brass cartridge for military use. Black powder. [3] Replaced by 8mm Lebel. [3] 11×60mm Mauser: 1871 Germany R 11×60mmR 1430 [3] 2013 [8] 2.815 77 [3] 0.446 [3] 60mm The first black powder cartridge adopted in large numbers by the unified German Army, it was used in the 1871 and 1871/84 rifles. 11×60mm Murata: 1880 Japan R 11 ...
The fact that it is not a bottlenecked case means that the brass is worked less as it is swaged back to size in the reloading process than cases like the .357 SIG where the shoulder is moved slightly with each fire and reload cycle. The less the brass is worked in this way the slower it hardens and the longer it will be before it tends to split.