OT The P39

[Jorge_Stanbury]

The Russians had AP ammo for their NS-37 cannons; these were deployed in Il-2s, Yak-9Ts, and Lagg-3s

The M4s on Russian P-39s, used HE, so they were probably not used in tank busting

[Barb]

NS-37 was a post war cannon used in MIG-9, MIG-15, MIG-17.

Il-2 used 23mm VYa-23 cannon with muzzle velocity of 905m/s (2,969 ft/s) for AP, HEI, HEI-T ammo.
Ju-87G used BK3,7 cannon with muzzle velocity 1,170–780m/s (3,800–2,600 ft/s) for APCR ammo.
P-39 used M4 autocannon with muzzle velocity of just 610m/s (2,000 ft/s) for AP/HE ammo. No AP Ammo was provided to the soviets.

[Jorge_Stanbury]

Not according to wikipedia:

WW2 NS-37
https://en.wikipedia.org/wiki/Nudelman-Suranov_NS-37

vs
post war N-37
https://en.wikipedia.org/wiki/Nudelman_N-37

Yak-9T was a a variant specifically designed to use that cannon

"Yak-9T
Yak-9 armed with a 37 mm Nudelman-Suranov NS-37 cannon with 30 rounds instead of the 20 mm ShVAK, cockpit moved 0.4 m (1 ft 3 in) back to compensate for the heavier nose. Initially poor quality control led to multiple oil and coolant leaks from cannon recoil. Recoil and limited supply of ammunition required accurate aiming and two-three round bursts. Yak-9T was widely used against enemy shipping on the Black Sea and against tanks (the cannon could penetrate up to 30 mm armor from 500 m), but was also successful against aircraft with a single cannon hit usually sufficient to tear apart the target. Virage (constant altitude and velocity turn) time: 18–19 seconds. 2748 were produced.[14] "