Beautiful!, that’s all I can say... makes me want to restock one of my RAW’s w/Walnut, but would be to afraid of damaging it ( I’m hell on stocks!) I do still believe my standard LW 12 groove is more accurate w/ 10.3’s vs. the LW poly w/13.4’s ( for group shooting! ) for FT or long range shooting is where the poly wins out because its less effected by wind, SPIN DRIFT etc. that’s why it’s favored for score or Ft shooting!,(MY OPINION ONLY!), you also have to remember that the 13.4’s have a much thicker skirt, so work better ( conform to interior bore profile of poly- much better (gas seal!), I believe the pellets themselves 10.3 & 8.4’s are much more consistent lot to lot?, therefore better suited for group shooting? But you better know how to compensate for wind, Mirage,tail & head winds because it’s very critical with this combo.( Standard LW 12 groove / lighter pellets!) Then again maybe I just lucked out and got an exceptional 12 groove LW? Bottom line I’ve had very good luck with Both and will continue to use them! Hoping much more experienced shooters will chime in here!, I’m in my infancy, learning of the characteristics of these barrel/pellet combinations.