RE: How much black powder in a 30/30 load?
It is a tube that extends from the powder funnel to the mouth of the case. An old arrow sometimes works great - cut a piece about 12" long and epoxy it to the bottom of the powder funnel. Allows the powder to stack in the case very efficiently. I have seen instances where, without it, a given charge will overfill the case - and with it, the same charge winds up at the bottom of the neck.