There's a lot of engineering voodoo that goes into making a rifle work well and fire accurately. The length of a rifle's barrel and how it affects the velocity of the bullet is one of those major factors. In this post, I explain a bit of the physics involved here. But the real meat of the post is comparing three different barrel lengths, their ballistic trajectories, and how it might affect what zero you choose.
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Barrel Length, Trajectory, and Learning Your Zero - Everyday Marksman
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Barrel Length, Trajectory, and Learning Your Zero - Everyday Marksman
Barrel Length, Trajectory, and Learning Your Zero - Everyday Marksman
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