Lots of suggestions. I typically like a 6 oclock hold. at 18 yards, using a "split the bullseye in half" hold, with the front sight level with the "ears" of the rear sight, I am shooting almost 8 inches low.
I'll see if I can raise Smith and Wesson on the horn. Perhaps they have a solution.
A buddy has the same revolver, and put a big old luminescent tritium ball type front sight on his, and with it one simply obscures the target altogether, basically cover up the bullseye, and voila! Right in there. Perhaps I would do well to make this modification.
ETA: Just called the S&W toll free line. After a fairly lengthy wait, I spoke with a CS representative, and they just put a replacement sight in the mail to me. I offered to pay for it, the gentleman said it was free of charge. I asked if he wanted the old sight back, he said, no, I was to keep it.
Who says customer service is a dead art?