380: either -or
Looks can be deceiving. It appears awesome, however...
With a 95 grain bullet and a velocity of approximately 900 fps, that expansion will consume so much kinetic energy; the velocity, that immediately following the exchange of energy, the slug will decelerate rapidly!
It has turned itself into a nickel.
There is a measure of bullet penetration called sectional density, and those light weight bullets that have used up most of their mass forming into a "coin" so to speak, have even less of this measure than the feeble, cylindrical projectile that they started out as.
Please view the expansion phenomena gelatin experiments. The expansion, if it is to work must have a threshold of velocity. Once expansion begins, it is abrupt. That is it goes to what ever maximum the conditions will allow, while traveling through the test medium in what is a short fraction of the over all penetration. It is not gradually expanding through the route it takes, but in travel of only several bullet lengths, or less, it has fully expanded.
Now, if the bullet is not massive, there remains no shank behind it of much, but rather you have a flattened disc for a projectile.
That is asking too much of a mere 380 ACP; for me, in that caliber, give me FMJ or at least SW bullets.