Bourbon Reviews By Tony Mazelin / November 3, 2015 Oregon Spirit Distillers is an Oregon based distiller with a focus on making the best distilled spirits around, not just in Bend, Oregon where they are located. OSD makes a nice array of spirits, and among them is a great bourbon that has a mashbill that’s an interesting four-grain mix of corn, wheat, rye and malted barley.This whiskey is aged three years in new American oak barrels with a #3 char after having first been distilled at 150% proof. It is later bottled at 80 proof. Having won a Gold medal at the 2013 Bourbon Competition they have a winning combination here of bold flavors and refined finish.Here are my tasting notes for the C.W. Irwin Bourbon:Color- medium honey, golden and richNose- leather, caramel, spice- all spice, pepper, vanillaPalate- smooth, bite of heat and spice, butterscotchFinish- finish is short to medium, pepper, leather, wood, vanillaI give this bourbon a score of 88. A very nice whiskey for $28.00, you can find bottles of it for sale through a range of online retailers here.