about 1 year ago - magazine2 - Direct link
Hi, welcome. You need to be looking at the penetration value of rounds. The higher the number, the more pen. There's several different rounds that do different things.

The after-effect of penetrations are also important. For example, an APHE or APHEBC round will penetrate a tank, and then explode inside of the tank, killing all crew. APDS and APFSDS rounds pen and do a lot of pen damage, but don't explode in the tank, they use kinetic force and shrapnel from the rounds to do damage. HEAT-FS or HE explode on the surface of the armor, and penetrate that way.

Hovering over each round will show a small visual clip on the tooltip of exactly that round works.

You can see an explanation about all rounds here: https://wiki.warthunder.com/Tank_ammunition