Sherman v Pz IV, is there a rating problem?

[plloyd1010]

Perhaps it would be better to consider how the system deals with the values. The probability improvement as the AT to armor differential increases is not linear. The progression is 1, 3, 6, 10, 15, 21 out of 36. The Sherman firing at the PzKw IV comes in at the 6, as in 5-5 before other modifiers. Where as the PZKwIVf2 and g come in at 15, and the PzKwIVh with 21 (as in a 7 or more scores a hit).

I don't much like Otto's suggestion of a 4-4. It halves the Sherman's probability at 3 in 36. The PzKw guns would kill at 10 or 15 out of 36, 33% and 27% reduction. It would have the fight take a little linger, but leave the Shermans deader.

Oh and Otto, the guns are not the same. The M3 Lee/Grant uses the 75mm M2 gun, which is 32 calibers long. The Sherman has 75mm M3 gun, which is 38 calibers long. Both are on the lower end of capabilities for the time, but the M3 is clearly the better gun with high muzzle velocity and slightly heaver shot. The M2 was used in the Lee/Grant tanks because of recoil and space considerations.