Not sure, but seem to remember that the gun is set to do not
more than 50 round bursts, 1 second and they have about 20
bursts (1100 rounds)

That sounds about right, although I think it might be a 2 second burst.
Either way it's a bad day if you're the guy in the tank being chewed up
and spit out...

I've read the USAF intends to replace the A-10 (amongst others) with
the JSF (F-35A). With only a 20mm internal cannon is the anti-armor job
going to be done with missiles exclusively?