The validity and consistency of the equations derived in the previous study for the various contributions to the group-based (isotropic or anisotropic) virial in molecular simulations was checked numerically. For a simple model system, it was established that the "traditional" and "alternative" expressions for the virial lead to identical results. A problem specific to the application of the P3M method in constant-pressure simulations was addressed. Furthermore, the alternative formulation for computing the group-based virial was applied to constant-volume and constant-pressure simulations of systems containing 16 to 1024 SPC water molecules. Finally, the resulting data was analyzed in detail.