Ray pretty much nailed it.

Even though I own a 380. I don't much care for them. Low bullet weight and slow speeds aren't your friend. 90 grains at about 950 or if you have a super long 380 maybe 1050. No +p 380 ammo. As opposed to a 9mm 124 +p at 1220 fps. Pretty much everything bad about a 9mm rolled into one cartridge. It's a recipe for both poor expansion and poor penetration

I will say as a rule of thumb. Always carry a spare mag. It is the only way to clear some malfunctions. It it's a secondary gun then it's not as much an issue. For me outside of work. I'd rather carry a spare mag than a spare gun.