The were Canadian clamp-on WW - so brinel 13 and av. 466gr.
Years ago - 1977, in Smithers, I used a .45 pure lead round ball on a small black dog that beat up my little puppy - twice, on MY porch. The ball him between the eyes and it exited out the back of his head. Range - about 10 feet. Commercial Wrist Rocket with the heavy, black surgical tubing.