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We present two independent measurements of stellar velocity dispersions ($\sigma_\rm{\star}$ ) from the Ca\,H+K \& Mg\,\textsc{i} region(3880--5550~\AA) and the Calcium Triplet region (CaT, 8350--8750~\AA) for 173hard X-ray-selected Type 1 AGNs ($z \leq$ 0.08) from the 105-month Swift-BATcatalog. We construct one of the largest samples of local Type 1 AGNs that haveboth single-epoch (SE) 'virial' black hole mass ($M_\rm{BH}$) estimates and$\sigma_\rm{\star}$ measurements obtained from high spectral resolution data,allowing us to test the usage of such methods for SMBH studies. We find thatthe two independent $\sigma_\rm{\star}$ measurements are highly consistent witheach other, with an average offset of only $0.002\pm0.001$ dex. Comparing$M_\rm{BH}$ estimates based on broad emission lines and stellar velocitydispersion measurements, we find that the former is systematically lower by$\approx$0.12 dex. Consequently, Eddington ratios estimated through broad-line$M_\rm{BH}$ determinations are similarly biased (but in the opposite way). Weargue that the discrepancy is driven by extinction in the broad-line region(BLR). We also find an anti-correlation between the offset from the $M_\rm{BH}$- $\sigma_\rm{\star}$ relation and the Eddington ratio. Our sample of Type 1AGNs shows a shallower $M_\rm{BH}$ - $\sigma_\rm{\star}$ relation (with a powerlaw exponent of $\approx$3.5) compared with that of inactive galaxies (with apower-law exponent of $\approx$4.5), confirming earlier results obtained fromsmaller samples.

BASS XXXV. The $M_\rm{BH}$-$\sigma_\rm{\star}$ Relation of 105-Month Swift-BAT Type 1 AGNs