Well...The year I was born my father built a .45 Kentucky Percussion Rifle for me. Because of time issues growing up and location problem caused by moving around a lot I've never had a chance to do more than shoot targets with it few times. Until now that is. After taking it to the range for the first time in 10 years I decided that I was gonna hunt with it finally. Took it out yesterday with a friend of mine. He did a little rattling and sure enough in walks a nice 4X4 whitetail. With my heart thumping I set the irons on him at about 60yds and let'er roar. He ran about 30yds down the hill and dropped flat. As to the effectivness of prb. The shot entered high just behind the shoulder and took the top half of both lungs completely off, and lodged just under the hide on the offside. I have never grined so wide for any other deer i've killed...First BP hunt and never goin back to centerfire