We have had two detonations in Australia over the last 5 or so years regarding stuck live cartridges .The detonations occurred when a brass or steel rod was passed down the bore of the rifles and struck to remove the cartridges . Both rifles were destroyed and one person severley injured .Both occurences were investigated and no definate conclusion was reached as to why the cartridges detonated .I would be looking at another method of removal .Apologise for the late reply and not completely reading the entire post , but I was concerned for your safety.