I would try what Uncle Nick has suggested, I have used his advice since I started reloading and have made my reloads better and my shooting has improved. (I am still going to tell anyone else that inquires that I am just a natural!
Also, try adjusting powder charges and seating depths. Like others, I have not had to worry to much about jacketed bullets, but lead, for me, seems to have to be set a little closer to the lands for the "WOW! Did you see that shot?" effect.