Case capacity tends to be closer to 33.00gr and the default weighting factor makes no sense. The .204 is a lot closer to being over-bore than it is straight-walled. I have found that a weighting factor of between 0.42 and 0.45 is most accurate.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.