  The magneto-optical transport of gapless type-I tilted-single Weyl semimetals
exhibits suppression of total magnetoconductivities in the presence of orbital
magnetic moment in linear and non-linear responses (Yang Gao et al, Phys.\
Rev.\ B {\bf 105}, 165307 (2022)). In this work, we extend our study to
investigate magnetoconductivities in gapless type-I tilted double-Weyl
semimetals within the semiclassical Boltzmann approach and show the differences
that arise compared to single-Weyl semimetals.
