pub const MIN_CHRONO_DISTANCE_M: f64 = 0.3;Expand description
Minimum sane chronograph screen distance from the muzzle, in meters (MBA-1377). Below this
the correction is negligible and a nonzero value more likely reflects a data-entry mistake
than a real chronograph placement, so correct_chrono_velocity_fps rejects it outright
rather than silently applying a near-zero (and therefore noise-dominated) adjustment.