>>1797524
A good chunk of those might be a result of HP damage as well. Spears have a narrow band of damage they roll, the wooden spear deals between 1 (iirc that's about 33 damage at 5 STR 0 skill, which is 30% of the base damage) and 1.4 damage and deals 5x damage on a critical hit. Since most "normal" HP zombies are around 100 HP and 120 HP, 33x5 is more than enough to kill them.

>>1797528
Generally speaking, that's how skills work right now. At 0 skill a character actually only deals 70% of the damage they normally would, and each level both gives you a boost to a weapon's crit rate and another +10% damage. At skill 7 you deal 100% of the damage you're supposed to for whatever you roll and get a +21% to your odds to critical hit. Crits just straight multiply the damage, so you're liable to instantly kill a zombie through sheer HP damage when you're at super high skill.