"Burn" mark on SP101 cylinder


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Fudgie Ghost
October 9, 2005, 08:52 PM
I have been shooting some OLD (early 70's) wadcutter ammo out of my 3" SP101, and I have gotten some kind of discoloration on the outside of the cylinder, towards the barrel end, on the raised parts of the cylinder. It won't come off with Hoppes, or Slick 2000 cleaner (water based degreaser). Anybody have any clue as to a) what caused the marks and b) what will get it off?

Also, what the best cure for all the lead I now have in the barrel?

Here's some photos:

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Mastrogiacomo
October 9, 2005, 08:56 PM
Not sure what to make of the pics. I use M-Pro 7 with good results. Never came across anything like this with any revolver, including my SP101.

The Goose
October 9, 2005, 08:58 PM
Try Lead Away gun clothes from Kleenbore it will come right off.

TOADMAN
October 9, 2005, 09:05 PM
Lead Away Cloths works for me.

Pistol Toter
October 9, 2005, 11:03 PM
Yeah, Lead Away cloth. Might try some acetone, if that gets it, it is some sort of residue from old powder. Flitz will also probably get it off.

Fudgie Ghost
October 10, 2005, 12:46 AM
Thanks everyone--I'll get some Lead Away wipes, and if that doesn't work, I'll try some type of solvent--I've got lacquer thinner, or Goo Gone. MP7, I tried-- nothing.

Yeah, those old rounds were producing quite a bit of smoke! Can I use the Lead Away wipes as a patch to run down the barrel and get the leading out in there as well?

Kamicosmos
October 10, 2005, 12:57 AM
My SP101 does that too. For cleaning that, as well as the burn rings on the front of the cylinder, I use ONE drop of Remington's Bore Cleaner. It is a bit gritty, so I only use one drop, and only use it on my stainless revolvers. But, gets them very clean!

Arch
October 10, 2005, 12:58 PM
I asked a similar question a few days ago, and got a tonne of good suggestions. You might want to check out this (http://www.thehighroad.org/showthread.php?t=159151) thread.

Old Fuff
October 10, 2005, 03:29 PM
What causes the marks is burning powder and lead flecks that escapes between the cylinder/barrel gap and is contained so to speak, by the topstrap. It happens on blued guns too, but may not be noticed. On stainless revolvers a lead-away cloth will quickly remove them if they aren't allowed to build up. Don't use the cloth on a blued gun however.

Fudgie Ghost
October 10, 2005, 05:39 PM
Well, I tried my Goo Gone (petro. solvent) which helped a bit, but didn't quite get it all. Have to get some Lead Away wipes.

Old Fuff: yes, I see that, on the inside of the topstrap, where it meets the front of the frame, there is quite a bit of built up, well, I guess, lead and unburned powder. Any suggestions for getting this off? Bore brush and ?

Obiwan
October 10, 2005, 06:35 PM
http://www.slip2000.com/carboncutter.html

It will look like new

Bill

Old Fuff
October 10, 2005, 08:22 PM
If it's really built up with lead start with a dental pick and work carefully. :eek: Thereafter finish with a piece of lead-away cloth.

O course this applies to stainless steel guns only ... :uhoh:

Edited to add: Use a Lewis Lead Remover (available from Brownells at (www.brownells.com) to de/lead the chambers and back of the bore. A regular cleaning brush should handle the rest.

Lead is easier to remove if you let bore solvent soak overnight. Given time it will migrate under the lead and loosen it.

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