[Pibwl]

Definitely Poland had no improved AT rounds. There were used two types, APHE and AP-T, with similar weight and construction. Penetration 8 suggests some APCR, like German rounds. On the other hand, penetration of a basic round should be IMO improved - now it's 5, while according to a Polish source it penetrated vertical 60mm @ 300m (48mm @ 500 m) - seems it was slightly better, than Pak-35/36.

Michal