ZRider
It has been my experiance that APP is one of the weakest powders out there and on the other hand T7 is one of the stronger.
I do not shoot a 45 so I am not familiar with the max loads for that caliber, but as FG says T7-2f is approximately 15% hotter than regular BP or the Pyros... personally I thik it is more like 10% but, compared to APP it might be more like 15%. Moving to T7-3f use dhould reduce the load another 10% - really it creates about the same velocity as T7-2f but it reaches a slighly higher pressure in a quicker period of time.