There are two types of Winchester that say SXT on the box.
One is the Winchester Ranger-T law enforcement design that has the teeth. That says SXT on the box.
The civilian version that you can buy at Bass Pro or Sportsman's Warehouse is not the same bullet design, even tough it says SXT on the box as well.
The LE design is far better.
The militia of the United States consists of all able-bodied males at least 17 years of age and, except as provided in section 313 of title 32, under 45 years of age who are, or who have made a declaration of intention to become, citizens of the United States and of female citizens of the United States who are members of the National Guard.
United States Code, Title 10, section 311, paragraph (a)