Steve,
Check out this old post.
http://forums.nitroexpress.com/showflat....true#Post250793
I have expansion tests and weight retention was in the mid 90% range.
I have not recovered bullets from anything I’ve killed with these bullets as whitetailed deer just don’t offer enough resistance to stop them even at x57.velcities (2100 fps)..
Exit wounds did show signs of expansion though.