I recently found myself the owner of a beat up,
neglected Winchester 94 in 30-30. Cleaned up
the rust (the receiver is one of those '70s Problems)
and tried it out.
The sights were junk (not original) so ordered
2 different configurations. First, put on the peep
sight and a new front sight - after several sighting-in
shots it was better, but I wasn't satisfied with the peep
having to be so high. Off it went.
Next is a barrel mounted semi-buckhorn with the little piece
to fine tune elevation. Since I find the little white diamond
distracting I reversed it and guessed at where to set it.
Slid the sight into the dovetail and centered it on the barrel.
Gathered some ammo and a target and set it up at
about 45 yds. Aimed at the top point of the 2 inch diamond,
fired 2 shots............
The lower 2 shots are a different boolit aimed at the bottom
point of the diamond.
To make a long story short, I installed the sights using the
SWAG method and they were perfectly aligned!