They make the following statement on their web page and on other sites which sell their bullets.

This provides for a hard yet ductile bullet, which will not fragment, or blow-up on the toughest hide or even bone. Our bullets do not lead your bore. Our lube has allowed us to shoot our cast bullets in test rifles as fast as 3100 fps. Loading data is included with most bullets.

Has anybody used these beyond 2000 fps and found this to be true?

Eric

Yes, I routinely shoot the 405 gr .459 diameter out of my .458 Lott at about 2300 fps and the 425 gr .475 diameter out of my .470 NE at 2200 fps, no leading problems with either rifle.

Good to know. Thank you Karl