ΔE 13.7, fair: the same colour family, but not a straight swap. Leadbelcher is noticeably lighter than Gun Metal.
✓ Army Painter Fanatic conversion chart lists these two as equivalents.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Leadbelcher is noticeably lighter than Gun Metal.
The same difference applies the other way round: Gun Metal is noticeably darker.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Gun Metal on the colour wheel See Leadbelcher on the colour wheel
All matches: Gun Metal equivalents · Leadbelcher equivalents