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The 8mm Lebel round produced by Prvi Partizan is of excellent quality and replicates the performance of the original round. While newly manufactured 8×50mmR Lebel ammunition has become available in the U.S., reloadable cartridge cases can also be produced by reforming. Wartime experiences (1914–1918) involving hundreds of millions of Lebel rounds fired in combat have entirely confirmed the effectiveness of these protections.
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Those small covers are not noticeable, but do provide a second effective protection against accidental primer percussion inside the Lebel's tube magazine. Furthermore, all balle D and balle M French military ammunitions featured convex primer covers which are crimped in over the primer itself. The tapered form of the case itself did help too to keep pointed tips away from the primer cup of a round in front of another in the tube. The role of that circular groove is to receive the pointed bullet tip of the following round loaded inside the tube magazine, and keep it at the side of the case base of the previous cartridge, so the tip does not easily slide to the base center where the primer is located. In order to safely accommodate pointed (spitzer) bullets inside the Lebel rifle magazine, a circular groove was machined around each primer cup at the case base on both balle D am and balle N ammunitions. A balle T ( tracer ammunition) and balle P armor-piercing rounds were also produced, along with blank and reduced charge cartridges. Converting most Lebel-caliber rifles and carbines to use the "N"-type ammunition was carried out during the 1930s. The new balle N was again heavier than the balle D am, and had been designed to improve the long-range performance of the issued Hotchkiss machine guns. It was held into a case which had a slightly larger neck diameter than that for the older balle D am ammunition. The balle D am ammunition was followed in 1932 by balle N ammunition, which featured a lead-cored, cupro-nickel-over-steel-jacketed, pointed boat-tail bullet weighing 15.0 g (232 grains). This ammunition was in near-universal service during World War I (1914–1918) in all Lebel-caliber weapons. Later on in 1912, the round was improved into the balle D am ("am" stands for " amorcage modifié" or "modified primer"), done by crimping the primer in more deeply to prevent primer expulsions when fired in machine guns. Designed at the Atelier de Puteaux (APX) by Captain Georges Desaleux, the balle D was the first pointed and boat-tailed bullet to be placed into service by any military. This balle M was replaced in 1898 by a new design, a 12.8 g (198 grains) 90/10 bronze mono-metal, pointed ( spitzer) boat-tail bullet called " balle D", which provided a flatter trajectory and improved long-range performance. Technical drawings of the French 1898 pattern balle D bullet Although it was once revolutionary, the 8mm Lebel was declared obsolete after World War I and was soon after replaced with the 7.5×54mm French round. The bolt thrust of the 8mm Lebel is relatively high compared to many other service rounds used in the early 20th century. However, the shape of its rimmed bottle-necked case, having been designed for the Lebel rifle's tube magazine, also precluded truly efficient vertical stacking inside a vertical magazine. For use in the magazine tube-fed early Lebel rifle, the 8 mm case was designed to protect against accidental percussion inside the tube magazine by a circular groove around the primer cup which caught the tip of the following pointed bullet. The long-range ballistic performance of the 8mm Lebel bullet itself was exceptional for its time. Standard 8mm Lebel military ammunition was also the first rifle ammunition to feature a spitzer boat tail bullet ( balle D), which was adopted in 1898.
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Formed by necking down the 11×59mmR Gras black powder cartridge, the smokeless 8mm Lebel cartridge started a revolution in military rifle ammunition.
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) rifle cartridge was the first smokeless powder cartridge to be made and adopted by any country. The 8×50mmR Lebel (8mm Lebel) (designated as the 8 × 51 R Lebel by the C.I.P.