Since some of you are using Burrard and Gough thomas to support thei sposition, i offer the following quotes from the two gentlemen in question:

Gough Thomas:(1975) "Cartridges were hitherto denoted by the length of the unloaded case, which was never greater than the length of the chamber. Since crimp closures became the rule, they have been denoted by the minimum length of the chamber for which they are designed, as stated on the carton THEY MUST NEVER BE USED IN CHAMBERS OF ANY LESSER LENGTH".

Burrard: (1932)"If cartridges are used which are too long for the chambers the pressures generated will be excessive and will cause irregular patterns irrespective of the risk of straining or even smashing the gun.....For these reasons it is always important to use the proper length of case for a particular gun, the proper length being always stamped with the proof marks on the barrel flats"

Still, these authorities, the two proof masters and the whole of the British gun trade must be wrong since one or two of you have been using the wrong ammo and have not yet shot your guns loose. I do not find your arguments compelling.