I figured the 20mm would be turned by the titanium bucket. I guess not huh? So the CRAM is essentially a stationary Vulcan?It takes almost 15-30 minutes to load up 1500 rounds (15 cans of 100 rounds). A 20mm round would not "bounce" off an A-10.
I trained about a day on the M163 SP Vulcan at Sill in 1976. Most of my training was not operational it was learning the capabilities.
When you heard that loud moan you knew what it was. Then the ripping canvas sound of the rounds above you as an FO was awesome.