It these handloads are that much more explosive than other commercial HP loads, then I'd say someting's a little fishy. I'm not sure how your retired LEO buddy built 'em, but I wouldn't trust them for anything more than executing milk jugs.
For decent .380 loads I'd suggest a look at Speer Gold Dots and CorBon DPX. They'll both provide about all you can expect from a .380----------which includes penetration.
(what would John Wayne do?)