Note to Much Ado About Nothing, 1.1.42: "challenged him at the burbolt"
burbolt: bird-bolt, a blunt-headed arrow used for shooting birds. The relatively safe bird-bolt could also be used for target practice.
Bird-Bolt. Illustration for A Cyclopaedia of Costume or Dictionary of Dress by James Planche (Chatto and Windus, 1879).