Perhaps, but why on the cylinder face? And why on the chamber edge?I'm leaning toward the idea that the cylinder ding could be the result of a hardness test.
Perhaps, but why on the cylinder face? And why on the chamber edge?
I'm leaning toward the idea that the cylinder ding could be the result of a hardness test.
You typically don't do harness test on parts your going to sell to a customer due to the fact that it leaves a mark on the part. You sample one or two parts from a larger heat treat batch for testing and then do not put those test samples parts back into the production stream.
I believe Ruger hardness tests 100% of their Magnum revolver cylinders, due to the high pressure they are subjected to. In the past this may not have been the case. But today with the litigation factor, they more or less have to. It isn't worth the legal risk not to, in the event one should possibly let go.
Interesting. That really should not be needed if you have your heat treat process running correctly.
Mine isn't exactly on the chamber edge, but it is on the face. I have another Ruger magnum revolver that has the same ding but on the back of the cylinder, not the face. I have a third Ruger magnum revolver that doesn't have the ding at all.Perhaps, but why on the cylinder face? And why on the chamber edge?
Stainless Steel used in Firearms is not hardened to a high degree. A lot of times they will leave stock on the face, and O.D. of the cylinder. That way they can hold dimensions more precisely, and apply a true face on the cylinder. It also allows them to remove the Rockwell mark from hardness testing. Or at least reduce it so it is much less noticeable.
There are a lot of operations on the cylinder that require accurate machining. Parts grow and shrink in heat treatment. So many times things like cylinder bolt notches, and chamber finishing are preformed after heat treat.
View attachment 873317
Question on that. I just pulled out my SP101 circa 2008. Only mark on the cylinder is an “S”. Is that related to the testing? Seems like it’s something else.
No marks on the face.
View attachment 873317
Question on that. I just pulled out my SP101 circa 2008. Only mark on the cylinder is an “S”. Is that related to the testing? Seems like it’s something else.
No marks on the face.
That’s it huh? I wondered if it were that simple but I thought since they’re mostly stainless, and I think blackened stainless, that it had to mean something else.S = stainless...
Just to confuse things, my SP101 DAO has a "C" stamped where the "S" is on the photos posted.