PAHUNTER105
I am really unsure of what to tell you - normally I would agree not to use T7 in a flintlock, but your ML is designed so you can use Pyro Pellets, which I also think is odd.
I am wondering where you got the information that you might be able to shoot T7 in the gun.
I am not very versed on shooting a flintlock so I ca nnot offer any real meaningful advise...
Maybe Caygad or even other Penn State hunters will see this question and chime.