I think I hit the magic number on luck. I have 7 stars now for Critical Banker... and for some reason I get fusion cores off random legendary enemies. I have about 40 fusion cores now at level 37. I don't use the power armor unless I have a mission vs supermutants. Does luck affect fusion core drops or have I just been really lucky. Normal difficulty on PS4.

Working as intended.

yes, fusion cores are classified as ammo and luck increases amount of ammo found.

I've got 10 luck (no bobblehead) and keep finding stacks of 3 and 4 cores. Cores for daaaaaaaaayz