We might see the same thing with American published 8x57mm loads vs European factory ammo.
The American load books would have use shooting 30-30 power level, and the factory ammo has 30-06 power.
Load books are not engineering books or source data.
They are consumer level recipes.
If you want to go rouge and design your own loads, you have to know what you are doing.
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?