The trick to locating the hole in the stock.
Click: https://www.youtube.com/watch?v=fs8lHJ9cNdw&feature=youtu.be
Set up in the mill and used a hole saw...a little dull, but no run out.
Click: https://youtu.be/KxCN8z5SCSc
Fixture used to clamp the stock in my mill vise. Angle iron screwed to an oak insert in the stock channel
Cut the hole open with a hobby saw,sanded and turned out perfect

Click: https://www.youtube.com/watch?v=fs8lHJ9cNdw&feature=youtu.be
Set up in the mill and used a hole saw...a little dull, but no run out.
Click: https://youtu.be/KxCN8z5SCSc
Fixture used to clamp the stock in my mill vise. Angle iron screwed to an oak insert in the stock channel
Cut the hole open with a hobby saw,sanded and turned out perfect