Evan, its just a pig. Just load your rifle with BP- about 75 grains should be in the ball park, but try from there up to 90 grains using FFg powder, under your PRB, and you will have sufficient medicine to kill a hog. Don't expect the hog to drop dead on the spot, unless you can shoot it through an ear and hit the grain. A chest shot will kill it, but it will take a little time for it to die. Remember to watch out for its friends, because they get scared when they hear loud noises and may run into by mistake. Keep a tree at hand you can grab and shinny up on just in case it gets exciting after you fire your shot. The hog may run at you, but its trying to escape, rather than attack you. Let it go by and just trail it after you reload your gun. A duplex load is done when you are using a black powder substitute. Usually a few grains- 10-20 of black powder are loaded down the barrel first, followed by a charge of some substitute powder, like Pyrodex, or Triple Seven or whathaveyou. The black powder is used to ignite the substitutes which have a higher flashpoint temperature, and are harder to ignite for that reason. A duplex load offers no advantage in hunting other than letting you use up some substitute powder you regret you bought. The extra time it takes to load two powders slows down the reloading process somewhat. Most people carry the powders in pre measured containers, and just dump the BP charge down the barrel first, then dump the container with the substitute powder down next. If you had to load these from a horn and measure, it would be very slow indeed. Only a chronograph will tell you if fooling around with a duplex load will work in your particular gun.