Sorry for the huge delay! Complications on this end.
This data is from the renowned LEE Reloading Manual.
It's showing a 35gr LEAD plain bullet at up to 4400 FPS which is INSANE!
EVERY OTHER Reloading manual shows just a little over 2,000 FPS for LEAD bullets AND those are with GAS CHECKS!

In the Hornady Reloading manual, in the bullet section, it shows a .224 SX bullet with a warning that it not be shot over 3,400 FPS lest it disintegrate after leaving the muzzle.

I am just curious as to why LEE would publish such ERRONEOUS information?

I thought it was an honest manual and really liked that it included the H²O water capacity of the case used in the data EXCEPT that I noticed some very odd numbers, ie: some smaller cases having a larger capacity than a larger case. No, I didn't write them down, I just remembered that I saw them.
However if need be, I can go back and find them if need be.

I hope that I am NEVER near someone shooting handloads with erroneous information.
We make enough mistakes without having "professional" help, lol

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