User blog comment:Gracchus Mccarthe/This post is about the Rancor gun on the update picture./@comment-25739940-20150212185956/@comment-26971153-20150212204410

In real life, firing a Feldhaubitz at a zombie at point-blank range would also kill you. And a 5-inch shell going 100000 m/s would instantly kill anything, even a Savage Necrosis elite.

(Speculation:) The friction would reduce the bullet to plasma, and its momentum would make it hit the target super hard and vaporize it instantly.