I was surfing Amazon and came across "pin gauges". So I ordered three.
.356, .357, .358
They were only a few bucks each. Well now that I've got them I cleaned the three guns I wanted to check. My 627, 686+, and 929.
The .357 pin fits thru the throats on all three guns. The .358 pin didn't go thru any of them.
So, now that I know this, what do I do? Just toss them in my tool box?