From DocGKR in 2018 in the "Wadcutters vs. Hollowpoints for snubnose carry" thread:
Question:
Doc's answer:Have you tested standard wadcutters through auto glass?
Of course.....about 2 decades ago. It is all about the hardness of the lead and the launch velocity when confronting glass. Harder lead WC's at 744 fps went 14"; softer lead WC's at 651 fps only went 9". Next time we gel test, I'll see if we can shoot some current factory WC's through some auto windshield glass.