Dig,
What you describe actually did used to happen in Motor racing, especially when a driver was having an identity crisis he would disappear around the back of the circuit and deliberately detonate a perfectly good engine. That was until engine management and telemetry became common.
Perhaps the Proof houses need to check pressures nearer the muzzle in light of these current problems.
One thing is for sure these guns that are failing are not the weakest barrels available and have not suddenly all become necessary to be proofed at the same timescale. So we have to question, The test procedure, the test components, the test operatives. Something is definately wrong and IF these valuable artifacts are being ruined by incompetence then recompense should be sought. We both know that will never happen but I am sure the Guardians should be made aware of our concerns.
