I'm not saying .380 is better or as good as 40 or 10mm, but even a .380 can shoot through auto glass or a car door without issue.
[video=youtube_share;FhfKSXWLNxg]http://youtu.be/FhfKSXWLNxg[/video]
[video=youtube_share;79CodjHFwVI]http://youtu.be/79CodjHFwVI[/video]
Thats not saying much. My Red Ryder BB gun can shoot through auto glass. (the side windows anyway)