do you find your reloads need to be a little hotter for the porting?
Well, SOME velocity must be lost to the ports.
I've been using Power Pistol for my .40 loads. It's definitely very strong. Great for .40 IMHO. Actually I've been backing off lately on my target fare charges because they just seemed a bit much.
Your thinking's got to be right according to a chronometer. I understand that PP burns real fast so maybe it's a little less affected by porting than slower-burning powders would be, but I'm no expert.