Sounds like a good situation for the Speer .44 Magnum Gold Dot Short Barrel, 200 gr at 1075 fps (if you can find it). Many more options if you handload as noted above.
Better off using the special case to duplicate the low end magnum round that you are looking for.In a civil case ,or with a liberal prosecutor,the .44 spl will bring you less grief to defend than the magnum.Two things that you are going to want to survive.First the bad guy,then the aftermath.