I have posted a video or two from this fellah on other parts of the forum, before but his latest video addresses a question that I have often seen regarding the use of FMJ as self defense ammo for a .380 (he also addresses FMJ in a 9mm.) Obviously his 'intended target' and 'innocent bystander' targets aren't 100% comparable to humans but I think they do a pretty good job at being fairly analogous and work well for demonstrating his point - probably better than ballistic gelatin. Also, although he isn't using a P3AT in the demonstration the gun he is using - with its 3 inch barrel - is comparable in type.
Keep in mind, too, that (at least in my experience) the Remington UMC and Winchester White Box stuff he uses in the demonstration - at least based on my non-scientific observations - generally don't seem to be among the 'hottest' loads out there. If these relatively low end range ammo types can give the results he got imagine what the 'hotter' FMJ loads (European loads) that some people believe to be the best option for SD could do: