Perhaps I'm reading the picture wrong. Looking at the two topmost drawings, it seems you have slightly different dimensions for the casehead diameter and angle.
>There's one more thing about 357SIG i've found out - it's either misunderstanding on my side or a fucking scam.
Wouldn't it be the other way around? Because the revolver has an extra ~2 inches of "barrel" from the chamber, if the SIG claim is that it can replicate the performance of a 4“ barrel revolver out of a 4" barrel autoloader, isn't it in effect replicating the performance of 6" of revolver out of a 4" barrel?
Also, still reading through the whole thread, but what's the cartridge of choice at the moment?