Something else to consider of course is the number of Panthers and the number of guns firing at them. A low probability of hitting a weak spot times thousands of Panthers times goodness knows how many guns shooting at them over the course of their lifetimes and suddenly the chances of a few being knocked out by fluke hits goes up somewhat.
There is a well documented example of this principle at work during EPSOM in June 1944. A whole Squadron of Shermans were advancing when they came face-to-face with a lone Tiger no. 114. They unloaded on the Tiger and the flurry of shot so rattled the crew they bailed out and ran. That Tiger was also damaged by a deflection off the mantlet down into the crew compartment
and red-hot splinters started a small easily contained fire-if the crew had hung around to put it out. Note the top section of the drivisors visor has been blown away.
Edited by mkenny, 17 February 2017 - 1307 PM.