I am tying some size 17 PMD's this morning. I am using what I THINK folks call "turkey rounds". Not completely sure of the term. These are the non-leading edge of turkey quills. In the photo below, the "quills", normally used, are on the left side of the wing. What I call the "rounds" are on the right side.
Correct my terminology if wrong.
I like using the non-quill side feathers as in small hooks, they work a bit better..........