AM is right. It's not bulging or bursts that are the real problem, it's how much life is left in the bbls.

Thin walls cannot be repaired, so a dent or a bulge in the wrong spot will put the bbls out commission.

If thin walls were a problem and minimum thicknesses needed to be established, the London & Birmingham proof houses would done it and they would fail any gun with walls below the minimum.

In the past they did not do this, and as far as I know they still don't.

OWD

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