So be it - what I am saying is that the numbers are not co-related. 32,000 or 36,000CUP is not 32,000 or 36,000 PSI- that's all I was saying. In that sense, we're both right.
: Since i have seen that value given for the .450 #2 in relation to the .450 3-1/4", I repeated it above. It was only to show that the .450 #2 gave significantly lower pressure than the other rounds in the same calibre. This event is brought about by the lower expansion ratio of the larger case. This is because the larger case delivers the same ballistics with lower pressure. That is all.
: If you want to get further technical (which isn't necessary) do so at my expense. For most people is it enough to know the .450#2 gives real world (similar if not duplicate) ballistics at a lower pressure and it is therefore safer for the weaker actions or actions of unknow bursting strength, such as using 12 bore actions for rifle ctgs.