Blackhawk cylinder question

[RMHoward]

Hi folks,
Been wondering this for awhile now, so i thought i would ask. I have two new model stainless blackhawks, one in .44 and one in .357. Both were bought new within the last three years. I notice a difference in their cylinders, besides the obvious hole diameter. On the .357, the cylinder bores (on the barrel side) seem to have liners (for lack of a better term) in them, that is to say the metal is black around the holes like they have been lined with a different metal or something. On the .44, the area around the cylinder bores is the same as the rest of the cylinder, satin stainless steel. Can anyone enlighten me on the reason for this difference? Are all stainless .357 cylinders like this? Thanks in advance.
Rick

 

[tek4260]

I think you are seeing a carbon ring from shooting it around the front of the cylinder, not a liner.

 

[Salmoneye]

Need pics...

 

[RMHoward]

Well, honestly, it hasn't been shot enough to have carbon buildup yet. Here are pics.

http://static.panoramio.com/photos/medium/77337087.jpg

.44 on left, .357 on right.

http://static.panoramio.com/photos/medium/77337108.jpg

Better view here.

 

[Tellico]

Looks like carbon to me. Try http://www.midwayusa.com/product/591584/kleen-bore-lead-away-gun-cleaning-cloth and you can remove it. Do not use this on a blued gun though, it will remove blueing also.

 

[RMHoward]

Thanks for the reply. Like i said, it isn't carbon. It is much too uniform and the line between the two colors is very distinct and crisp. It was purposely done, i just do not know why.

 

[Scout943]

Tellico is correct . My .357 does the same thing, and out of the box they were not there !

 

[RMHoward]

Wow, i will have to look at this again. Thanks.

 

[CraigC]

It's carbon scoring. Not a "build-up" but scorch marks. Leave them be, you'll do more harm than good trying to remove them. Those lead removal cloths do remove metal.

 

[RMHoward]

Ok, thanks. Will do. I guess i assumed they have always been there. I was wrong, i guess. They just seem so perfect, as if they were supposed to be there. My bad. Thanks for the help.

 

[Koveras]

If you compare the "perfect" scorch marks on the front of the cylinder with the size of the back of the barrel, you will see why they are so uniform. When the bullet base exits the cylinder, the hot expanding gases have to go somewhere. Some of them are channeled between the cylinder face and barrel and scorch the cylinder in a nice even pattern. The intensity of the circle has to do with several factors, including barrel/cylinder gap, caliber, high velocity fast burning powder, etc. If you get a scorch ring, but it is not a nice clean circle, then you need to be concerned.

The scorch marks do no harm and I just wipe them with Hoppes #9 to remove any residue on top of them.

 

[Rclark]

The scorch marks do no harm and I just wipe them with Hoppes #9 to remove any residue on top of them.

+1

 

[Knuckles]

Looks to me like the gun on the left needs to be shot! :wink:

 

[RMHoward]

Looks to me like the gun on the left needs to be shot! :wink:

Roger that. It is a new gun that i have not had time to shoot yet. Will take care of that shortly. Thanks to everyone for the info.

 

[Tommy Kelly]

Yes and when you get back from shooting it you will have the same rings on it. You don't notice it as bad on a blued gun but they are there.