The calculations you did have nothing to do with the topic.
Like the pressure topic, there are no calculations available to us, and all we really have are thought problems. You seem to be all for thought problems when they suit you.
If someone was willing to destroy a 1911 or similarly configured pistol, we could decide the matter correctly - through experiment, rather than bad math.
So if you don't think this is a subject worth discussing, then we won't discuss it.