I didn't find anything in a search and ran across these. It is a non expanding solid copper projectile designed to tumble. One thing I did find interesting is the test of 2 20 ga sheets of steel with laminated glass in between. This represents a car door with window rolled down. While not as common as tempered glass laminated safety glass is becoming more common than just high end luxury cars and is used on Dodge Charger police vehicles.
https://www.youtube.com/watch?v=UWOqUxFWq2o
https://www.youtube.com/watch?v=CLyla_Db-a0
Presented for informational purposes and food for thought.