HK:
No, I haven't seen one cracked. Nor do I know anyone who has seen one. I've read about it so many different places, and was told by so many 'smiths, I beleived it.
I beleive you guys. I built a .416 Rem on one of the Winchesters. I want a .458 Lott on another. No plans for number 3. Thaanks again