Black talons were the original winchester line of Law Enforcement ammunition. They featured six petal design, nickel case, and were coated with lublox (or is it lubalox?) anti friction coating. They in no way shape or form actually defeat bullet proof armor - yet this was one of the huge arguements to end the line of the black talon. Another arguement was from surgeons saying they did not want to operate on a gun shot victim that had been shot with a talon, as it increased the risk of being pricked/cut open while removing the bullet and being exposed to diseases.
Moving along winchester dropped the black coating and now the Ranger T ammo is in its third revision of the black talon original design. Still features six pleats, nickel case, etc. One thing I have noticed about this "brass" is that its somewhat weak. I split a few cases reloading them - they had only been fired once before. Somewhat odd. Other cases are doing fine.
The SXT line is a eight petal design. It works no where near as good as the 6 petal design Ranger T and black talon. It should be noted, that Ranger T and black talon are marked as Law Enforcement Ammunition, the case says Law Enforcement Only ammunition etc. Winchester says it is perfectly legal to purchase and own this ammo. BUT, the dealer can lose its distributorship if found selling to civilians only. Their thinking is they want LE's to have first crack at the ammo, not joe schmoe.
As Brad mentioned, contact Jerry Kirkpatrick. He is reliable and a pleasure to do business with. I believe he accepts checks and money orders. Tell him how much ammo you want and your zip code so he can quote you the price with shipping.