After googling around some, I found this thread! Anyhow yes, it seems that 37mm, as well as most other allies projectiles, had their AP replaced by APC or APCBC starting in 1943. For the 37mm, this gives it an extra 10mm penetration.
Uncapped AP was used for training only in 1944 from what I've gathered. However many are also mislabeled ingame, statistics for an AP shot may be taken from an APCBC, especially true for German tanks.
Edit:
In addition, tungsten wasn't used by Germans except special cases post 1943.