Dunno, just cut 150 on 5/8" Manila and it did fine.... Zero Edge damage and this one was reground to .005" behind the edge and 30 Degrees inclusive... 400 Grit Silicon Carbide...
[video=youtube;VyH5YELNdPk]https://www.youtube.com/watch?v=VyH5YELNdPk[/video]
convincing video. I am willing to send you my knife for comparison.Check the message on the youtube