Both of them will work but just for your piece of mind check the load on the range. Of the two "PELLETS" I like Pyrodex better. I had some Triple Seven pellets that were flaming stars when fired. And we are talking a new box of them. Never had that happen with Pyrodex. Also the best group I ever shot is with Pyrodex pellets.

While Pyrodex is the most corrosive powder out there, if you clean your rifle after you shoot, there is no danger of any rusting in using the powder. Its powerful, consistent, and a very good powder. The fouling is soft and easy to remove with water or Windex. The people that hate it do so because it is the "most corrosive of powders" granted, and yes you have to clean the rifle within a day of shooting it, or you might experience rusting. My feelings are cleaning a rifle that day or the next means nothing to me. Big deal, ten minutes out of my hectic life. And then the rifle is ready for the next day.

On the other hand Triple Seven (in loose form) I think is a great powder. Its powerful, although you have to swab between shots because of crud rings, its easy to clean, and I find when shooting sabots its very accurate. Also when I shoot heavy conicals, I use this powder.

But if I were going to stick with pellets, I would go with Pyrodex.