I hate chasing my 10mm brass, has anyone here tried one of the 10mm to .40 conversion barrels in a glock 20? I have buckets of .40 brass and could care less about how much of it I lose.
Used a KKM 40 barrel in my Glock 20. I loaded my 40's to 1.235 OAL and it shot great! I made GM in Limited with that set-up back in the mid/late '90's.
We have done several Glock 20 custom builds that included the KKM 10mm/40 S&W conversion barrel for running 40 for practice or range work and they work great.