For lead bullets Summers Enterprises are priced right, they also have coated. W231/HP38 is fairly forgiving but don't overload. 38spec's are a really good place to start and a 686 can handle hot loads if you go that way. Start low on powder charges according to manufacture's charts, make a few and test them then make a few more a little hotter till you find your guns sweet spot. Good luck and have fun, be safe above all.