There is armor in this game. Armor sometimes does its job. The .30 calibers in AH seem to perform as they really did in the real deal. Remember that these .30 caliber cartridges were the same rounds that the soldiers fired from their rifles, they were not hard hitting rounds in comparison to the .50 calibers or the light cannons (20mm on up). If you are firing at tanks, shore battery bunkers, ships, or any other armored target (even the M3, M8, SdKfz 251, Whirlwind, Eastwind, or M16), the odds of your .30 caliber rounds ricocheting are quite high. The chance of the .50 caliber rounds doing the same are good as well, unless you hit the softer part of the target (turrets on Wirby and osty; rear of M3/M16/251; or unarmored guns on a ship, etc).
Carry on.