Comparison of 1 − b_WL as a function of true mass for the mock CHEX-MATE Tier 1 (top) and tier 2 (bottom) selected samples (purple lines and shaded 68% confidence level regions), compared to a random distribution of halos with matched mass and redshift distributions (orange lines and shaded 68% confidence level regions), using varying priors on the value of c₂₀₀ to obtain M_WL from the mock shear data. Left: c₂₀₀ = 4. Middle left: c₂₀₀ = 3. Middle right: c₂₀₀ obtained from the c − M relation of Diemer & Joyce (2019). Right: c₂₀₀ varied as a free parameter.