HS-6 will get you some serious +P velocities. It just won't happen with current data. HS-6 HAS GOT TO HAVE A MAGNUM PRIMER. Otherwise you are going to have abysmal results. Unburnt powder and wide ES and SD.

It meters like a dream and as Erich has stated, ArchAngel, has rung the limits of this powder in the 38spl. He'll be along, guaranteed, once he reads the title!

Alk's estimation is a bit high to get the desired results, but not that much. The Speer #8 maximum load is a bit less than the 8.4gr he stated and I too wouldn't go there. Speer #8 maximum load though, yeah, I'd give that a try. It says that they got over 1200fps from a 6" K frame! Now that is +P performance to say the least!