I don't want to steal the thread, but not once a deer just standing there? I thought hard about shooting two this year muzzleloading. I shot one with the rifle at 40 yards, and another just stood there at 30. I had the scout pistol right on it. In the end I decided not to, as we had shot 4 does, no need for more.
Even as I was reloading the rifle, a third deer stood there for about 15 seconds. I doubt you could ever get a shot at a deer, reload, and get a second shot. I don't even consider reloading speed for hunting. If you use a sxs, or carry multiple guns, you can definitely get more than one. Just don't move after the shot, once they see you, they split.
It's worth noting the land I hunt sees plenty of human activity, although minimal hunting pressure. There is shooting from most neibors all year too. The deer do not give a second thought to gunfire. If you hunt heavily pressured deer, your experiences may differ.