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The BEAR series is a line of hunting ammunition. The cartridges use lead-cored Full Metal Jacketed, Soft-Point (Semi-Jacketed), or Hollow Point bullets, have steel cases with Berdan primers, and use a non-corrosive propellant and primers. The sub-brands differ only in the protective coating used on the cartridge case.
7.62×54mmR lead core, bi-metal copper-steel full metal jacket bullet, polymer-coated steel case, non-corrosive, berdan primed. Note: Around summer 2013, some lots of this cartridge caliber from Romania contained corrosive components , thus the firearm needed to be thoroughly cleaned after each firing session.
Modern Berdan primers are pressed into the "primer pocket" of a Berdan-type cartridge case, where they fit slightly below flush with the base of the case. Inside the primer pocket is a small bump, the "anvil", that rests against the center of the cup, and usually two (or more) small holes by the sides of the anvil, which allow the flash from ...
The primer type can be Berdan or Boxer Large Rifle. [24] U.S. Army Research Laboratory (ARL) research papers on the influence of Berdan and Boxer primer spit-hole diameter on 7.62-mm cartridge performance concluded the primary advantage of a Berdan primer is that they are less expensive than a Boxer primer due to their reduced complexity.
Unlike the USGI ammo, which has non-corrosive Boxer primers, it has corrosive Berdan primers. The cases have longitudinal scratches along the sides, like they have been reloaded. The bullet has a black sealant at its base and the primer has a clear pinkish-red sealant rather than an opaque red sealant. They come packed in 50-round cartons.
With quick firing guns (those using metallic cartridge cases) the case itself is fitted with the igniting medium; in England these are called primers. For small guns the case contains a percussion primer, usually a copper cap filled with a chlorate mixture and resting against an anvil. [2] The striker of the gun strikes the cap and fires the ...
The 10.7×58mmR cartridge used in the Berdan was also invented by Hiram Berdan, with the assistance of Russian colonel Alexander Gorlov . It was the subject of many patents in both the United States and United Kingdom. The bottleneck cartridge case used the Berdan primer, its first use in a small arms cartridge.
This page was last edited on 17 May 2015, at 00:03 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply ...