There is always discussion about the Lott but I was wondering about the 450 Rigby. How do the two compare ballistically? I am going to assume it is just a 416 Rigby blown out to accept the bigger bullet or is it a seperate animal all together? I remember seeing an article on this cartidrige but that has been several years ago and I don't read much about it anymore. I am always thinking about having something built and this is one I have thought of, so any info would be great. Thanks, Bruce