Need help with SW 642


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JAguirre
June 22, 2010, 12:49 PM
I've already searched the forum to no avail. So, here's the skinny. I have a 642 that I fired 50 rounds through this weekend for the Texas CHL instructor's course.

I didnt have time to clean it until yesterday afternoon and while doing so, I found that some of the finish around the forcing cone is gone. Also there is a there is a straight scratch, mark, (or whatever the technical term is) across the top strap where there is a noticable indention in to the frame itself, but behind the cylinder gap.

I took it to a gunsmith this morning and he didn't want to mess with it because the pistol is very new (only fired 200 rounds through it).

Ive exclusively shot Winchester 130gr FMJs through it, no reloads. I did remove the internal lock, which I dont think would cause this, but I mention doing so, because Im curious if I need to put the lock back in before it goes to SW.

Does anyone have pics of flamecutting on their 642? I'll post pics this evening when I get home.

Thanks in advance everyone.

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ArchAngelCD
June 22, 2010, 01:03 PM
The mark on the top strap is probably a bit of flame cutting. It's normal and will stop at some point and that point will be well before any weakening of the frame occurs. Not to worry if it's just a little flame cutting. The 642 is an aluminum alloy revolver with a clear coat finish. Some of the clear coat will wear away where hot gasses hit it. (like around the forcing cone) That's my guess without seeing what you are telling us about.

These are just guesses from what you're telling us, I hope I guessed correctly.

The Lone Haranguer
June 22, 2010, 06:30 PM
I concur.

Old Fuff
June 22, 2010, 06:42 PM
It sounds like normal gas cutting, and the ammunition you are using isn't particularly hot. They used to anodize aluminum frames, but now they use a less expensive coating. At this point don't worry about it, but watch to see that it doesn't become worse. If you should return the revolver to S&W, do put the lock back in. Otherwise they may replace it and charge you for the parts & labor, or refuse to work on or inspect the gun at all. You also might try lead in place of jacketed bullets to see if it makes any difference.

Jim K
June 23, 2010, 08:20 PM
It will probably go to a point, then stop. As Fuff says, keep an eye on it.

Jim

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