I'm lucky enough to have a friend who really likes the old Colts. The other day, he fished around in his safe and came up with this First Generation from 1919. The bore and chambers look new and the action is tight.
The load we used was a 115 grain lyman sized .313" over three grains of bullseye. Average velocity was 763
We had a sample of the well known computer virus in a can which i managed to hit four of five times at 25 yards