Compressing powder is something I have done.
For real hard compression, I put a pin gauge in a collet bullet puller die.
I do that because a bullet would yield under that much pressure and expand in diameter.
The powder may then expand the brass from hard compression.
So I resize the loaded ammo.
The cartridge must be able to fall into and fall out of the chamber or a huge pressure spike will result.
But even with a hardened steel pin gauge, AA#9 [a ball powder] is not going to compress enough to notice.
800X is flakes and it will compress over 50%.
AA#9 is little balls, and it will not compress enough for me to measure.
The word 'forum" does not mean "not criticizing books."
"Ad hominem fallacy" is not the same as point by point criticism of books. If you bought the book, and believe it all, it may FEEL like an ad hominem attack, but you might strive to accept other points of view may exist.
Are we a nation of competing ideas, or a nation of forced conformity of thought?