The reference catalogs loaded for the astrometric calibration often span a magnitude range quite different than that of the icSrc catalog to which it is matched. Trimming both catalogs to a roughly similar magnitude range would make the job of WCS matcher/fitters easier and less prone to the bad matches that can lead to terrible WCS fits (see DM-30466 for examples & discussion). Cutting on magnitude at this stage is potentially dangerous as we do not have a calibrated zeropoint. However, if we feel for a given dataset that we can trust the per-band calibrated config values for fluxMag0T1, the "approximate flux of a zero-magnitude object in a one-second exposure, per filter." to a reasonable extent, some gains could potentially be made. This ticket is to explore this possibility in the context of HSC and DC2 data.