Just finished a run out to the desert to test out a few 45ACP rounds with a different powder through my G30 with the KKM barrel.
Everything went bang and feed and ejected smoothly. It's nice not to have to bang on the back of your slide to fire the next round.
Keep a plastic bottle hopping a lot at 20-25 rounds and had a blast hitting stuff out there. This KKM barrel appears to be more accurate than the Glock and LWD barrel.