I had a LW 6" 10mm barrel in my G20, originally. It did not work well for me, was the leading cause of a "ka-boom" I had the first range session with the pistol. It does not offer good case support for 10mm - or at least mine did not. It was also so "tight" that brands like Buffalo Bore did not chamber well, Double Tap would not chamber at all. It would have been hard to determine accuracy, since it basically would not shoot properly. I replaced it with a Glock 6" barrel, and pretty much all my problems went away. I would likely not buy/own another LW barrel.