hello,
i do not have any mechanical or engineering knowledge re loose ribs but i do have many years experience around shotgun people and gunsmiths in the british trade.
i have always understood that a potential major fault
with a loose rib is the fact that rainwater or other undesirable
liquids may have seeped under the rib and possibly caused severe and dangerous unseen damage.
if i wished to use gun i would relay ribs rather than gamble with safety.
cheers
mrwmartin

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