emrg3 - Thanks!
Not sure how long it took, maby 4 hours messing with it a little at a time. It was sort of a rushed job, just to see how it would look.
I wrapped it in masking tape, marked up a pattern where I wanted the holes, started with an 1/8" bit in the press and worked my way to 1/2". Don't forget to set the depth gauge!! Sorry, I did not weigh the barrel before. Now I've got to research what the weight was. But it now feels like it weighs about the same as the factory 18" barrel - it had a noticable weight loss. I wonder what the post office will think if I walk in and ask him to weigh it?
I painted the whole barrel in gloss black. Then I used sanding cloth to sand the paint off, leaving the paint in the dimples.
I should have taken more time on marking the pattern and the starter holes. If you look carefully you can see how some of the holes (Ghetto dimples) are a little closer to each other. Looks better from about 2 feet away.
The real test will be if it can still shoot 1/2" @ 50. Or, it might blow up.
Forget "Dremel Fluting". You want "Ghetto Fluting", which uses a cut off saw !!!!