i only found the jacket[weighed about 30grs.] in the hide on the far side,it looked like the heart and lungs had just exploded.i took a decent size cow elk at about the same distance,i spined her on the first shot on purpose and had full penetration[i didnt want her to go over the ridge [it would have been rough packing her out],the second [killing] shot went in the front of the chest[quartering slightly] and came out the shoulder penetrating a couple feet of elk.for deer i think its a great bullet[they die easy anyways]but for elk the verdict is still not in,i would have to say results were mixed too,i too would like to hear more about how the 142mk performed for other people.my-2-dave