And you're with F-Troop?
Lotsa luck with that.

David,
I have a G20SF Gen3, been having the same issues with FTF for almost a yr now. Bought a aftermarket bbl from Storm Lake after having a KB from hot handloads and OEM bbl.
Replaced the RS with the ISMI rod and 20-22lb springs, replaced the trigger spring too. Replaced the magazine springs with Wolf +10 mag springs. Still same problem with 200-220 gr hard lead from both Underwood and my own handloads using Doubletap lead  bullets. About ready to sell this thing.
My girlfriend shoots a S&W 1006, awesome pistol with no problems whatsoever!!! However, they have doubled in price lately, none to be found at a reasonable price.
I live in NW Wyo., big bears are a problem here and I switched from a Ruger Bisley .45 LC with nuclear handloads to a G20, I think I'm going back to my big revolver until this FTF thing gets worked out. Thanks for the test reports, I'm kinda doing the same thing with no changes in performance so far. I really liked the idea of a affordable(?) semi-auto that would work in self defense for big critters.