Soviet fighters and 4.12

[gaunt1]

Soviet 12.7mm should be much more powerful than now. It was far superior to the Browning .50, and almost at the level of the MG151/15. But ShVAK & B20 should be weaker. It had quite low HEI content for the total weight of the projectile.

http://www.quarry.nildram.co.uk/WW2guneffect.htm