Yes, I think HS6 is the same powder as Win. used to sell as WW 540.....

In my Raging Bull, I am using the Cast Performance LTB 260-grain gascheck bullet with 28 grains of Alliant 2400. It is a lot less powerful than the Winchester Premium 260-grain load, but gives a MV of 1550 FPS. This is plenty for deer or elk within 100 yards!