he YouTube channel Military Arms Channel did several ballistic gel tests with this bullet. Looked quite impressive.
Copper bullets are more expensive but more effective than lead ones.
This bullet looks to have excellent performance against soft and unarmored targets, but performance against armor would probably not be so good.
There was another YouTube channel that did some other tests through windshields and car doors. I can’t remember the name of the channel, though I’m sure a search will turn it up.