Surprised to see people talking about spudguns firing whole potatoes! I didn't even know that was a thing. The spudgun I had when I was young just fired small parts of a potato, with a whole potato enough to last for ages. I think it was the Lone Star Spudmatic. Not only safer but less wasteful.
FWIW, it looks like Wikipedia differentiates the smaller spudgun from the larger potato cannon: https://en.wikipedia.org/wiki/Spud_gun vs https://en.wikipedia.org/wiki/Potato_cannon