Wheelgunner.
Thats not all that strange. Fact is, when I prime the pan, I will put some up in the pan, snap the frizzin shut & give the side of the rifle a couple light raps. The 4fg powder is fine enough to go in the vent hole. Same principle that you use, just I don't have to remove the vent. You should be able to get the priming powder in the vent hole rite outta your spring loaded priming flask.