I like a FFP with an illuminated reticle, somewhere around 3-15 power. A shot at 400-500 is one where I'd like to have real wind holds, and be below max magnification. That means FFP. You could go SFP if max magnification is around 10 power, but if you want to spot your hits or watch the deer after the shot I find that moderate distance and high magnification makes that difficult.
If you dial wind and elevation, it's not such an issue. I dial elevation and hold wind though.