I don't do chain saw milling, but I use my own build of portable bandsaw. I have a simple rule: don't have too many cutting teeth in the cut. For wide cuts (39" in my case) I grind back the tips of 3 in 4 teeth (saws mainly supplied as 1.5 or 1.75" pitch) so that I have one cutter in 6 or 7 inches of saw. This gives easy, accurate cutting. A saw for small logs (say 20" or so) cuts freely with 3" effective pitch.