I've got version 3.6 and get slightly different numbers than you.
14.6gr AA9 gives me between 69 and 75k psi, depending on which listed Speer GD I pick, between 119 and 122% compression.
14.6gr Enforcer gives me between 58k and 63k, at between 125 and 128% compression.
Even if you're pressure theory were correct, I can't see fitting that much powder in the case, under ordinary rules.
Still happily answering to the call-sign Peetza.
You do not HAVE a soul. You ARE a soul. You HAVE a body.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.