The manual that came with my Son's new Rossi youth muzzleloader says to only use pyrodex pellets. So I call them and they said I could also use 777 pellets but I had planned on using 777 granular. I asked them why and the guy said it was a realiability issue and you could get hurt if it didn't go off and ended up going off later. Isn't the powder more realiable than the pellets. Of course I am not going to look down the barrel if it doesn't go off. Any advice? Do you think they know what they are talking about?