I've been carrying my M&P bodyguard 380 everyday since 2015 & lost track of how many rounds I've put thru it. I usually put around 50 rounds a month practice shooting it. My carry loads are either Federal Hydra shoks or Hornady Critical Defense. Reliability with both of those brands has been 100%. I get a occasional light strike using Monarch/PPU ammo, Remington green box too. But never the defensive carry loads. Keep it clean at all times and it will serve you well. Great little pocket gun!
I favor the Hornady Critical Defense for short barrels. I've heard foriegn (Monarch/PPU) ammo uses hard primers. I don't know about the remington. Right now, I have American Eagle and Winchester White Box. Anything the Smith doesn't like, I'll feed to the Glock 42.
