we have hogs that like to root around in mud. it can build up and make an effective armor coating against pistol rounds. we shot a downed hog 3 or 4 times through the shoulder with a .45 and it did almost nothing. my buddy pulled his .357 and one shot in the same place, the hog squealed and bucked like it got hit with defibrillator paddles, and died. anecdotal, sure, but I carry a .357 revolver in the woods...