Pzgr 40/42 (HVAP)
12.7 lb, 10.5 lb, 4.72 kg, 4.75 kg
3,675'/s
1,120 m/s
170
30
194
174
150, 149
127
106
174mm at 500ms, hell even better than my link.
So you are using the values of the IS2 with regular ammunition while using the Panther stats with Pz.Gren. 40/42 HVAP. Of course the results will be different.
In reality Pz.Gren 39 was used almost all the time since production of the 40/42 model was stopped in 1943 due to Wolfram shortages.
But ok, you have your opinion, I dont even want to argue anymore since you will just twist and turn everything around to suit your point.
If you compare penetration stats at least use ones with the same ammunition LOL