pub const FFI_BC_REFERENCE_ICAO: c_int = 0;Expand description
Which standard atmosphere a bc value passed to ballistics_bc_for_reference_standard
is referenced to (MBA-1365). 0 = ICAO (the default every other export in this module
assumes), 1 = Army Standard Metro (some vendor-published BCs, notably many
Sierra/Hornady/Barnes bullets). Any other value is treated as 0 (ICAO), matching the
permissive unrecognized-value convention convert_inputs already uses for bc_type.