I have a question about the clark custom and the Accuracy rifle systems custom mini 14's. One uses a bull barrel and the other a barrel harmonizer. What exactly is this and can anyone tell me any pros or cons between the two? My primary interest is for shooting coyotes at less than 200 yards. Occasionally I like to shoot neat little holes in paper as well. Since my primary interest is varmits, and my style is spot and shoot not calling, or shooting from a bench I thought maybe a custom barrel would give me an advantage over the normal 2 MOA normally associated with the mini 14.