Had my Renegade at the range a couple months ago for the first time in 12 years. One of those "know-it-all" range lizards came over to tell me "you've really got to watch that Pyrodex, it ages quick, don't let it get over a year old". I didn't bother to tell him that the canister I was punching holes in the 100 yard bulls eye with was 12 years old
. By the way, the new canister I bought shoots the same point of impact as the old stuff.