Originally posted by Feynman no shell. It's a development of the railgun. Only a metallic bullet moves. No powder, no container.
What's cool about railguns, as opposed to typical guns, is that the projectile actually accelerates all the way down the "barrel" until it is let go. The longer the barrel, the faster the "bullet". Some railguns fire so fast that they can shoot down aircraft without aiming ahead.
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