No FMJ but I ran 50 185 gr. Remington jacketed hollow points through mine no problem. I also ran some Remington 230 gr. HTP they did fine. I try to shoot what I carry at the range. But money is a factor. I prefer the 230.
I've shot 1600+ rounds of Winchester white box fmj 230 grain through my shield 45 no problems yet... I carry hornady critical defense 185gr, I have over 200 of the hornady through it no problems either...
I've shot Federal 185gr Hi-Shok and Hornady 185gr FTX through it without any issues. Quite frankly, I prefer the 185gr for the single stack Shield 45 and the 230gr for my double stack 45s.
I have done extensive ballistic gel testing with the .45 Shield.
Corbon 185+P and Remington Golden Saber 185+P performed excellent
Golden Sabers were quite a bit hotter than all the other +P's
Federal HST 230+P performed excellent through heavy winter clothing.
I will carry Golden Saber 185+P in the winter and Corbon DPX 185+P in the summer
I have shot Berrys 185 gr HBRN also 185gr lswc 185 plated swc all with no problems. Also shot a few boxes hornady 185 gr Zombie loads. Seems this pistol will eat anything you feed it