There is technically no such thing as +P .380 ammo. Some companies advertise ammo as being +P just as a marketing ploy or to warn you it exceeds SAAMI specs. The .380 is generally fired in an unlocked breech, blowback pistol. These types of hanguns generally require a narrow range of pressures to safely operate.
I would avoid any .380 ammo labeled as +P.
The only calibers that can truly be called +P are 9mm, .38 Special, .38 Super and .45 ACP (maybe .257 Roberts).