Wolfgangross has posted a new set of wonderful cutaways:

https://www.ar15.com/forums/ar-15/New-Russian-7-62x54R-Armor-Piercing-Cutaways-7N37/16-760618/

"New Russian 7,62x54R armor piercing.  Don't even bother asking if I have extras, already gone.  Extremely rare and expensive.  

7H13 (PP) with hardened steel core and purple neck/ red primer  

7H26 (BP) with hardened steel core and both red neck and primer sealant

7H37 with tungsten carbide core and both black neck/ primer.  

And the core is heavy at 7.3g (M993 has 5.91g, and RUAG P/T/308 at 5.59g)

No tip colors, goes by primer/ neck sealant colors and dates.  

Questions are welcome, thanks for looking

wolfganggross"

The 7H37 has a 113gr Tungsten Core vs 91gr for M993, so likely has better penetration.

And the 7H26 looks to have a longer, more complete hardened steel penetrator then M2AP:

Very impressive. Sadly I lack the tools, skills or inclination to section my collection.