Dummy damage question


So i was testing a few different weapons on Kruber, Kerillian and Saltzpyre when i came across something that left me a bit confused.

The fact that aside from Kerillian´s glaive and spear almost every weapon seems to “only” do 20 extra damage on a heavy headshot crit.

Is this normal? Or are the dummies bugging and not displaying correctly?

I am fairly sure i have oneshotted Chaos warriors on legend with Kruber too,but when testing the armored dummy i do 96 damage on a critical heavy headshot which should not be enough.

Does anyone happen to know for sure if the damage displayed when hitting the dummies is completely off? Or if there´s been some major rebalance to legend enemy health?