Way to go, partner! Can't say I understand a 3" bbl on a 640, but as the old saying goes, "For every Jack, there's a Jill."
I recently bought two 442 PC guns from my range/FFL. I ordered one and the "nice gent" who ordered the 2nd did not respond to any messages that it had arrived. Fun being in business, isn't it? So I absolutely had to take this 2nd 442: I was concerned that it might become a range gun. Can't have that, can we?
Getting uglier out there, partner. Stay safe. Check 6.
Just picked it up at my dealer's. Very nice - looks unfired. Pre-times nicely. Just rounded the trigger face a little and the back edges of the trigger. I get pinched between the back edges and the trigger guard.
Real nice gun! I have the same Herrett's grips on a 3" 317. They fit the hand really well and look great. Be advised that an HKS speedloader in .38 will not clear them.