While I don't have exact numbers, I doubt anyone has, my observations over the years is that there are significantly less 586s with Patridge sights than ramp sights. I doubt you will find any Patridge sights on 4" guns, unless the owner had the ramp changed. I have seen 6" guns with integral Patridge sights, and some with pinned Patridge. Same way with 686s, but by far the majority are red ramp sights.
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Richard Gillespie
FBINA 102
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