What is "burrel shot"

Burrel shot \Bur"rel shot`\ [Either from annoying the enemy like a burrel fly, or, less probably, fr. F. bourreler to sting, torture.] (Gun.) A mixture of shot, nails, stones, pieces of old iron, etc., fired from a cannon at short range, in an emergency. [R.]

n. (context archaic English) A mixture of shot, nails, stones, pieces of old iron, etc., fired from a cannon at short range, in an emergency.