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On standard size sheet of plywood 4X8 Feet, on two saw horses, and four bowling pins set about one foot from the back edge of the plywood, object is to shoot all four off the table as fast as possible. Not as easy as it sounds, if you don't get very close to center of gravity on the pin, then it will drop on the table spin and be hard to shoot off the table. It was quite a challenge.

Ah that's cool. I think we would be able to adapt something like that to suit or rimfire .22LR challenge competition that I run. Not bowling pins though, something else.