DWalt, when you load up some with that powder, post up your results. I bought a pound of it to try out myself, last time MidSouth had a no hazmat fee deal going on. I also bought a pound of the Major Pistol powder to try too.

Looking at their data, it looks to me like the Heavy Pistol might be a tad faster powder than Accurate #9 according to the data that Accurate has put out.

For 357 Mag, the Heavy Pistol is showing a load of 10.0-12.1 grains with a Hornady 158 XTP bullet. Accurate #9 data shows a load range of 12.4-13.8 grains with the same bullet.

For 44 Mag, Heavy Pistol shows a load range of 15.5-18.8 grains with a Nosler 240 JHP. Accurate #9 is showing a load range of 18.5-20.5 grains with a Hornady 240 XTP and 17.8-19.8 grains with a Sierra 240 JHC bullet.

Extrapolating from that data, I am guessing that the Heavy Pistol has a burn rate somewhere in between A #9 and A #7.

I also bought 2 lbs of Tactical Rifle powder to try out in 223 Rem for my AR.