I waste time recording and posting a bug and the answer is "this is normal for this game". Yea we have a loot of "terrain opmitization". Flying stones, trees in the middle of highways. All as expected.
The Remmington is a 1 hit to the head kill.
I have suggested the XMR have a drop chance with ammo from Toxic super zombies, and Toxic supers be more like supers from unturned, they can throw rocks or electrocute plays to make them a challenge, though that wont happen anytime.