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And, if the yoke was solidly mounted in a wall it wouldn't be bad. .75 caliber would be a little over 12 gauge IIRC, so unless she had a very hefty powder charge the recoil should not be unmanageable (as she demonstrated).~Kees~
Ray, You are referring to Punt Guns. Seems like they were of a larger bore size, like 8 bores, 4 bores, maybe even a 2 bore thrown in for chuckles. Ferocious guns they were.