G'day McGrath, Mi braincell is working overtime, trying to recall the 'Shooting Ballery' in the cicus sideshow, when I was a kid. You got a pea-rifle to shoot at fixed targets, or rows of moving tagets that flipped over when you hit them. One I recall also had a tub of turbulent water, with numbered ducks bobbing about on the surface. That was thetricki one. Maybe the expression refers to an early variant, with a barrel? Cheers - Sa,
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