Show me then, like i said youre the one making this claim, also checking this sources they doesnt mention them either
“Un dossier explosif” only mentions the penetration of 640 at 2000m, they dont say anything about the penetrator parameters.
“CN-120 (F1) “Lisse” 120mm Tank Gun”, this only mentions that the f2 have better penetration, nothing about the dimensions of the round