Let's not get confused here.
There are three "LE Only" (which doesn't mean non-LE can't have them) loads.
Black Talon-Black slug brass case. Public and LE sales.
Winchester Ranger SXT (Black Talon under a different name; there were also some called "Ranger Talon" for a while, but they were the same thing). These had the same appearance as Black Talons. Available for general sale to LE only.
Winchester Ranger SXT, T-Series. Improved Ranger round, with better penetration through autobodies and glass (responding to real life LE shootings) and more reliable expansion (again in response to LE shootings). AGain, this round is sold to LE agencies, individual officers and LE distributors, but you can find it easily enough.
My experience? It shoots well. It won't penetrate body armor. It will go through sheet rock (personal experience and a bad day at work). I also have personal knowledge of one shooting with it; it resulted in immediate incapacitation.