Jim, nothing will leave Greener without having been subjected to proof at the British Proofhouse. And, just like in this country with guns made in this country, British (and European) shells are loaded to pressures that match up with the proof levels of the guns in question.

There is no guarantee against stupidity, like someone shoving a 3 1/2" mag in a gun with only 3" chambers (assuming it would fit and fire). Do you think American gunmakers can guarantee that anyone who buys their guns is any less a potential "Darwin Award" candidate than someone who buys a Damascus Greener--other than the fact that the Damascus Greener is going to cost the purchaser just a wee bit more than a Mossberg pump?