Thanks for the info on the "E". I have shot mine quite a bit and knew it had the enlarged chamber because the fired cases looked sort of like a double bottleneck. It is one of the battleship Canadaicon rifles that went to Chileicon and the markings on the receiver ring and the barrel have been defaced by the p--sed off Chileans and I did not know what the "E" indicated. For the record it shoots off better than I do by far but a younger friend of mine shot it and did quite well so I know the rifle and my reloaded cases are good.