Balistol;spray on the spot,go have a coffee(or a beer)for 20 min and use an old toothbrush tu remove the spots.Balistol won't damage the blue(or wood or plastic).Smells funny but it works!
Qc

No but it does seem to damage my nostrils

Looking to get a new 29-10. Has S&W fixed this issue and stop drilling through?

Thanks.

Anyone have a picture of what it looks like?
We are to only file down the end of the screw (and not the head with the slot for screwdriver). About how much to file?
And how smooth does it have to be with the top strap?
Only have a hand file.

Okay, one more time... how many rounds??!!

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I'm too windy for 30 chrctrs!

A non problem. Clean it off and go on

Is this still going on? Hard to believe S&W hasn't corrected this by now. If you look at an earlier 29/629 you'll see that they were careful to drill the sight mounting screw just ahead of the cylinder gap.

Those that got the new screw from S&W that comes close / flush with the top strap...did the issue resolve completely? Or just minimized?

Thanks.

Anyone with continued issues of cylinder burns after using S&W's longer screw?

Out of curiosity, Is there some reason the rear sight mounting screw can't be moved forward on the latest model 29s? On the earlier 29s there is just enough room for it to be ahead of instead of directly over the cylinder gap. Pretty sure this burning and or cleaning will wear off the bluing off eventually.

Hi everyone, I had the same cylinder burn pattern on my 2016 model 629-6 44 magnum. Bad burn marks after 100 rounds fired but easily rubbed off with a lead away cloth (not to be used on blued guns). I got tired of the repeated scrubbing to clean the cylinder so I called Smith & Wesson Customer Service. The lady I talked to agreed to send me a longer screw to fix the problem at no cost to me. It arrived in about 10 days and I installed it. The screw is still not long enough to completely fill the hole flush but is better than the original. I would say 90% of the burn marks are gone now but you can still see evidence of burn after 100 rounds fired. Fortunately I see no erosion of metal in these areas. I feel for all of you that have blued revolvers and suffer bluing loss and agree this should not happen on a new handgun!

Thanks for the update Targetman!

So would you recommend using a different screw? Looks like someone mentioned Midway sells one that will need some fitting to make it sit flush with the top plate.

Any pics of what is still happening with the S&W screw?

Thanks.

Hi Neomedic, in my case, I am satisfied with the replacement screw Smith & Wesson sent me. However my 44 mag is stainless steel and not a blued gun. One minute with a lead away cloth (not to be used on blued finishes) and my burn marks on the cylinder flutes are gone. For anyone that has a blued finished revolver I would seek a screw that completely fills the sight screw hole. Modern blue finishes do not hold up well to the repeated blasts of hot gas on the cylinder flutes. Its more of a cosmetic problem but should not be happening in the first place.

Did the OP ever get a resolution from S&W over this?