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Repeaters weren’t exactly new, but most had been relatively low-powered, slow-loading lever-actions that were unsuited to long-distance, pitched battles against organized armies. The repeating battle rifles could also fire longer between cleaning sessions without degradation in accuracy.
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Clouds of black-powder smoke-which, on calm days, often completely obscured the enemy during high-volume engagements-were no longer a dead giveaway (literally) of the shooter’s location. Smokeless gunpowder allowed energy figures to remain high for extended ranges while bullet diameters and weights were lowered and made more efficient. It was usable in all weather conditions, faster on reloading, and safer when reloading from covered or prone positions-shooters didn’t have to expose their torso when standing up-and it had the related, inherent advantages of the breechloader, as it assumed its place in battle-rifle evolution. Metallic cartridges allowed the soldier to carry ready-to-go, water-resistant ammunition. Arguably, the three most important factors in making war at the infantry level current at the last half of the 19th century were the production of reliable, self-contained metallic cartridges, the introduction of smokeless gunpowder and the development of a powerful repeating battle rifle. The late 1800s were busy days in the progression of military armament around the world, and as that armament technology evolved, so did battlefield tactics.