AP Penetration Calculator & Weapon Guide

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I'm sorry, I didn't write that correctly. At certain ranges, an 88 would knock the armor loose and push it back into the fighting compartment. Not a chgunk but the whole plate. Shermans were real bad about that. The Armor would break loose next to the weld and keep going until it hit the Armor on the other side. Or wrap around the engine.
There was also something called a "shatter gap". At certain ranges and speeds a round would shatter when it hit the armor. A few meters one way or the other and it was a penetration.
Or so it is claimed. I took all that with a grain of salt. Between Murphy, Mars and Lady Luck, I don't believe that battlefield events can be reduced to formulas that are meaningful. WAG's are about the best one can do.
It is interesting.