Whirlpool

They say: "if you don't succeed try try again".
I was trying to take a good picture of the rifling inside the bore of a firearm. With different lightning and lens setup. I never got what I wanted, a clear picture, with deep focus within such small tube. I tried for hours, with about 150 different setup...and only recently I realized I may not have succeed at getting what I was looking for, but I think I got something better...something I didn't expected.
It might not looks nice to everybody, but I believe it worth sharing it.