Never heard of these but interesting.
http://www.lehighdefense.com
Yes another design concept of a 100% copper projectile (many places are banning any lead use) so it adds another viable option for the scenario where needed...
If you have to use something other than lead these and other makes can fill that need. But being a 100% Copper bullet adds cost and the copper is lighter than lead so bullet of the same weight as a lead core will be much longer and take up power space, so charge weights need to be adjusted to compensate and prevent over pressures...
I think some one posted a video of a lehigh 140 grain penatrator from a 10mm pun ing through a level lll trauma plate punching through a level lll trauma plate,very impressive to say the least!
I recently saw a recent vid on these......the only knock was the penetration....IIRC.
I may have them confused....either way, it wasn't impressive enough to engage me in purchasing any.
But then again.....I may be completely ignorant and just think I know what I just said. :))