Shot 50+ rounds of Remington, Winchester and two different handloads through the 40-9 KKM conversion barrel. Feeding was 100% and accuracy was excellent when I did my part. The pistol shoots to the point of aim. BTW, the KKM barrel has the older style barrel design with the collar. The factory .40 barrel that came with the pistol has the newer design without the collar. Test fire date 12/12. The KKM barrel is the same diameter all the way down the outside the barrel unlike the slight cone design of the muzzle end of the S&W factory barrels. The trigger seems to be getting better each time I make a trip to the range.