I'm fairly muscular by Sufu standards (5'6" and 170lbs) and I'm torn between a 38 or 36 for this coat.
I wear mine maybe 4 days a week. It fits like a 38. Not huge, just one size off.
-It's not that warm. I don't know what hunters wear, but there is no way a mackinaw and a flannel shirt could be warm enough for zero degree weather.
-It's not soft, rather itchy.
-The rear pocket kicks ass
-Filson.com says the charcoal is made of 24 oz while all other colors are 26 oz. I would get another color in order to get 26 oz if I did it again.
-I don't see how the double mackinaw could be too warm (though I have not worn that)