It was because of this thread that I went ahead and ordered a BK grip last week. I arrived today and I installed it on my 10-7 (square butt, standard bbl). Seems like a quality product. I haven't fired it yet, but it makes a huge difference just in gripping the revolver and in dry firing. Honestly, it makes me wonder why S&W shapes the grip frame that way. So many aftermarket grips close in the area between trigger guard and grip frame.

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low speed, high drag