Reviving a old thread here!! But its a subject that's near and dear...
OP IMHO your best answer was your first one.. Opie hit it spot on. The range os shooters ability, proficiency and if rested or not make the answers you'll get all over the board!!
My own G20 is a great shooter. I am a long time bullseye shooter with a Master classification in pistol. SO when I say mine shoots 2'' at 50 yards off a rest and one hole off hand at closer ranges. These are with hunting or ''full house'' loadings. Take that with a grain of salt.
This was 25feet offhand.
I have not tried light target type loads in my G20..