Cheek Weld
Consistent contact of the cheek against the stock comb that repeatably places the eye behind the scope for a clear, full sight picture every shot.
Cheek weld is the firm, repeatable contact between the shooter’s cheek and the comb of the stock, and it serves to position the eye at the same height and distance behind the scope on every shot. When the weld is consistent the eye lands in the same spot relative to the optic, which produces a full, centered view and removes a major source of vertical error. Many precision rifles use an adjustable comb so the shooter can set the cheek height to match the scope and ring height exactly.
When the weld shifts from shot to shot, the eye drifts out of position, which can darken the edges of the view, introduce aiming errors, and make any parallax in the optic harder to detect. A solid weld also reinforces the natural-point-of-aim by encouraging a relaxed, repeatable head position rather than craning the neck. Building that consistency is part of building a clean sight-picture shot after shot.