I've sort of been watching this thread and can't really contribute much because with one exception I know squat about modern inline muzzleloaders, truth be told I had to do a goolge search to see what exactly an Encore is, but one thing I'm curious about is what exactly it is you're trying to kill that isn't getting dead enough with 100gr of T7? I don't mean to sound condescending or sarcastic with that question, but a 295gr bullet atop 100 grains of powder should stop just about anything you're likely to encounter in N. America with good shot placement. Without getting into safety issues, shot placement is most important so the accuracy of your 100gr load would be more important than any potential gain in power from switching to 150gr even if such were a safe load.
If you really need more power, consider switching to a larger caliber.
That's my 2 cents anyway.
Cpt. Redleg