Hello: I've tried the pellets in my Ruger old army revolver. Sometimes they would fire sometimes they wouldn't. If I put about 3 grs. of 4f in first then a 30gr pellet it would fire everytime. But What a pain in the behind. I just stayed with the blackpowder. Goex is my first choice. Kik, Dragon, Elephant, Swiss. I shoot about 20-25 lbs a year. I also load cartridge shells and have thought about trying pyrodex in them. But have had such bad luck with it not sure I want to fool with it. Not sure if your using one or not but if you load blackpowder shells. Make or buy a drop tube. Very easy to make and usefull. I can send you a picture if you want to make one cost about 5.00 copper pipe from local hardware store. PeteAnybody shoot Pyrodex Pellets in their cartridge guns?