I COUNT 'HI-CAP'
I use wheels and autos both for IPSC, so I don't even try to count. I practice reloads....
44 Redhawk/357 GP100 = 6
45ACP 1911 = 9 ('cause I dislike the look of 10-rounders, plus I carry 8's)
all (well, most all) others = more. Sometimes lots more. Like 20.
Seriously, I believe that in actual combat (that's what it is) counting will be the LAST thing on your (my) mind. Screaming, running, etc. will be of higher priority.
I think I'll be aiming.....
Do as you train; I train "sight alignment trigger control".