T7 loose is probably the strongest propellant on the planet!
It kills the pellets. Just remember that if your gun is rated for 150 grains max, their talking about pellets. 150 grains of loose will knock teeth out!
Don't ever need more than 100 grains of loose. And mesure by volume not weight. As for POI, that all depends on your gun. My CVA Hunterbolt loves 80gr. loose. or 100 gr. pellets. The 150 gr. load throws my accuracy out the window. Hodgdons website says 70 grains loose is just as fast as 100 grains of pellets in a .50 cal. using 348gr. powerbelt.