Joe barrel flip is up and down, not left and right. Garwood reported that it most frequently appears on long barreled sub-bores.

As far as anchored barrels/guns: If the barrels didn't rotate when the shot is fired then the barrels could be made parallel. If barrels/gun with normal convergence were fixed where they could not rotate then the right barrel would shoot far to the left and the left barrel would shoot far to the right.

Last edited by AmarilloMike; 05/11/14 11:20 PM.

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