I took it and my trusty rifle out to the gravel pit where my amigos and I usually shot for practice and set it up with a target taped to the front. Then I paced off 125 steps - that being 100yds. based on the known length of my stride - and shot five shots at the target from an offhand stance. Upon inspection I found that all five shots had passed through the half-inch thick steel plate from 100 yds. as if it had been soft butter (or margarine). My rifle that day was a .243 Winchester with a 22" barrel and the ammo was plain-Jane Remington 100gr. Core-Lokt. with a 100-yd. energy of 1,629 ft./lbs. After hunting in many places for many years I still must admit that I have yet to find even the first deer or antelope or hog that was made out of half-inch thick steel plate.