Lucky Gunner's .45ACP ammo through the 1911. Note to self: Bring my Peltor Ultimate 10 passive muffs to work. In the tight confines of an indoor shooting range stall, a hundred rounds of .45 overwhelms the active HL's pretty quickly.
It ate up another hundred rounds with no malfunctions of any type to report. That brings the total to 200 rounds with no cleaning or lubrication, zero malfunctions of any sort, 1,800 rounds to go.