I have been unable to find a good, reasonably priced source for black powder (and I don't want to buy 25# on line) so I have been using Pyrodex which is very easy to find where I live. I have noticed that with my rifle (a shortened to 18" barrel .50 percussion Renegade) that when I shoot RS (ff equivalent), it's very common to have hang-fires but when I shoot Pyrodex P (the fff equivalent), it fires much faster and has more consistent ignition timing, causing me to shoot more accurately. Is this common?