Dry fire doesn't really show me much because it looks like the sight is still 90% of the time. I've thought about getting a laser to help show the inconsistency. Obviously something is moving somewhere.
I did some looking and found some monthly IDPA matches about an hour from me. I'll visit one and see if I can get some advice on an instructor.
Is Stoeger's book the gold standard? It may be all I need to clean this up. I feel like its got to be something minor that I'm missing.