They do look good and the load they are recommending is reasonable. I like Winchester 209's primers. Will; the best way to find out how your muzzle loader will shoot them is to try pack, also do not exclude the Shock-Wave or Power belt. I would clean my barrel after each shot. A friend of mine swears by American Powder and states it is easy to clean your barrel. Good luck let me know, I may be interested in trying them out. The only thing I can say is that the fun of shooting a muzzle loader is working up a load.