Barrel is Lilja #4 Contour CM beaded w/matt bluing. On a 70 degree plus day like yesterday the barrel heats, I would say really fast. 3 well spaced shots and its hotter than I would like. Can hold on to it but its HOT. 5 well spaced shots and you can't hold onto it. It also doesn't cool as rapidly as I am used to. When it had the Douglas barrel on it (30 years) I never noticed this kind of heating. Usually shot in complete sun light, not many trees in Idaho. Shade does help though. Any difference between CM and SS? What about Flutes?