Was kind of a failure My G23 seems to be one of the lead hater versions Tried a few powders. Tried soft, hard and even coated bullets. Tried fast, slow and in between.. Tried a FCD, regular taper crimp, no crimp, mild crimp and heavier crimp. Tried long, short and in between with OAL's. No matter what by 100 rounds I had VERY BAD leading at the throat and the last half of the barrel. The last 10 of 100 rounds were running about 20-25 fps less than the first 10. I never got past 100 rounds. Surprisingly with lead accuracy was good to fantastic. A Precision 155rnfp with 5 grains of WST@ 1.125 is SCARY accurate running around 925fps for the first 10 rounds. Also my G23(2009 vintage) tended to really guppy my brass. KKM to the rescue. Very short wait time for it. It loves the same load that did well in the stock barrel. And as a big bonus, brass comes out looking like new.