I remember reading somewhere its on wikipedia so not sure if its exactly accurate based on a webfind:
"Marseille attacked alone a formation of 16 Curtiss P-40 fighters and shot down six aircraft of No. 5 Squadron SAAF, five of them in six minutes, including three aces: Robin Pare (six victories), Douglas Golding (6.5 victories) and Andre Botha (five victories). His wingman Rainer Pöttgen, nicknamed Fliegendes Zählwerk the ("Flying Counting Machine"),[35] said of this fight:
All the enemy were shot down by Marseille in a turning dogfight. As soon as he shot, he needed only to glance at the enemy plane. His pattern [of gunfire] began at the front, the engine's nose, and consistently ended in the cockpit. How he was able to do this not even he could explain. With every dogfight he would throttle back as far as possible; this enabled him to fly tighter turns. His expenditure of ammunition in this air battle was 360 rounds (60 per kill)."
Whether this is correct or not, this is one amazing fate to pull off, especially as the conditions apply him alone vs that many.