Interesting, I started with it when it was called 540MS in the late 60's all the way till they quit making it, replacing it with 571. I used it to kill hundreds of ducks and geese loaded with 1 1/2 oz of 4 or 6 with win red wads. I used 34.5 grains of powder. I still have and use HS-6 and 7. I wish I had know it was worthless.
