The cite testing was done at Aberdeen Proving Grounds with the rifle held/clamped down and the looker able to move the target about with servos etc. Position was, target was moved, target was adjusted to align with the sights, position was recorded, ...
As noted, no test was done with aperture front and rear sights.
Perhaps one of you would be interested in doing some testing.
If a target were set up at, say, 100 yards; and if a rifle were clamped down on a secure bench; then repeatedly zeroing a micrometer rear sight on the target would tell the story. Align the sights, record the settings, move the sights off the bull, align the sights, record the settings...
A rifle isn't required, merely, say, a piece of wood or metal with the sights mounted.
I'll contribute a micrometer adjustable rear sight if anyone is interested.
Interesting winter project? Could be done from indoors, looking at the target through a window.
joe b.