For me, 90gr gold dots. I was told by an individual that he tried several .380 ammo choices and after several boxes of this and that he found that the gold dots were the only ones, for him, that ran without a hiccup. I purchased an LCP and two boxes of the gold dots. Ran a handfull, cleaned & lubed, ran some more, repeat... After several boxes now with no problems, well, I'm gunna stay with the gold dots. Even if penetration may be an issue as compared to FMJ or such, at least I'll get some hits (if I do my part when needed) by using reliable medicine. Having said all that, the LCP is a back up to a glock in .40
Say, Onlypill, what maker of the FMJ do you run through your LCP, do you trust them? Pray tell.