From what I read, it is not much different than the TC flintlock that's made to shoot pellets as well as regular powder loads except it is made in Spain for Traditions.
It still requires the normal priming of the pan and (according to the article I read) it doesn't work worth a darn using a synthetic powder in the pan.
As for power, it is supposed to be able to handle three pellets of 777 making it capable of a 150 grain powder load.
Anyone who thinks a powder load that is over 120 grains lacks power should probably stay with centerfire guns and avoid any muzzleloader.
Anyway, the Pa Pellet is a true flintlock but at the price they are asking IMO there are better choices available.
As for shooting pellets, I still hold to my own experience which says, avoid them.
As with any muzzleloader, this gun will have some powder/ball or powder/bullet combinations that work well and many loads that don't shoot well at all.
The likelihood that a 50, 100 or 150 grain powder load available with pellets being one of the sweet loads is very unlikely.