Thanks. I checked an Ameriglo .165 vs. the factory sight, and it's very close, perhaps a tiny but shorter. I'm going to try that first, because my preferred POI is the top of the post. If it looks good at 10 yards with my preferred load (the new Fed. hydra-shok deep 99) I'll go with that; if not, I'll try .180.
Did you move your web site, by the way? I can't find it lately.. You've been doing some great gel tests.