Thanks Toby. That should clear up a lot of our misconceptions about proof to many in the US. That is a issue many here do not fully understand. It took me a long time to understand it and even longer time to understand proof pressures and standard working pressures.
It is so much simpler over here where all barrels are thick as pump pipe and built to withstand stupid high pressure levels. Why a gun which can not stand 12,000 psi standard loads it is almost not worth shooting over here. BARs, LUPs and PSIs are so confusing to many.