In my Bersa Thunder 380, I have used Mag-tech FMJ and PMC Bronze FMJ most often, with no problems. I've had problems with Sellier and Bellot FMJ causing failure to feed jams.
I have also used Aguila JHP as practice ammo because it is often cheaper than FMJ and cuts a nice round hole in paper. I've seen video tests that show it doesn't reliably expand so I won't carry it for SD, but fine for range use.
Price-wise, anything under $13 per box of 50 is pretty good. I recently ordered some from Freedom Munitions for under $10.00 per box but I haven't had a chance to shoot it yet. However, all of the forum posts I have seen about it report no problems.