Nesting Goshawk

[Not rock pile related] Came across an angry territorial goshawk, which I would have thought was a smaller Cooper's Hawk. Except I have one of those nesting in my yard and this was just slightly larger, grey, and had a deeper voice. So it must be a small goshawk. I wonder if this is a small for any sort of distributional reason? I note that, according to Peterson, goshawk nesting range is extending southward (although not including Mass. in the maps of my edition).