Reign of the Undead - Revolution

Hey

Played Dock with Hoot this morning.
I was killed by 1 hit on Ice level. Hoot was killed by 1 hit on regular and so was I.
Ice there are 2 types, regular is mixed types.
Are there some types of zombies that are stronger than the other on the specific levels?

Normaly the damage isnt random...One typ of zombie/wave always does same damage. In mixed wave the damage is different.
Ice zombs do more damage than normal ones..

I had it to today 1 hit from a ice zombie and was down instantly.
By the way, is the barrett not a 1 shot kill weapon any more?

ok, tnx for info.