I'm working on 2 heavy weight cast bullets for the .458 Win Mag/Lott & 460 Weatherby. One is a 640 grain wfngc and the other is a 720 grain wfngc. Does anyone have any experience with 600 - 700 grain bullets in a 458/460 rifle? I know and have worked with the Barnes 600 grain Originals. They were quite accurate and penetrated well. I loaded them to 1900 fps in my 458 Win Mag. I would greatly appreciate any info and/or input.

I also would like someone to do some accuracy and penetration testing for me. Third party is always more credible than the manufacturer. So anyone who loves shooting a .458 Win Mag, .458 Lott or .460 Weatherby and would like to participate, please PM me. I'll provide the bullets for the testing.