I have never been able to get a good consistent group of 12" [kill zone sized] at 600 yards that is centered on the bullseye.
I can get that group at 500 yards if the wind is lower, with the 7mmRM.
So deer are safe with me at 600. I am not shooting.
But at 400, they are as good as dead with the 257, the 270 or 7mmRM.
I have been trying to get better for years, and progress is slow.
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?