  The Projected Dynamics method was originally developed to study metastable
decay in ferromagnetic discrete spin models. Here, we apply it to a classical,
continuous Heisenberg model with anisotropic ferromagnetic interactions, which
evolves under a Monte Carlo dynamic. The anisotropy is sufficiently large to
allow comparison with the Ising model. We describe the Projected Dynamics
method and how to apply it to this continuous-spin system. We also discuss how
to extract metastable lifetimes and how to extrapolate from small systems to
larger systems.
