Nice jigs. Not sure how much lead pouring you've done so this might be a little basic. Make sure you are using soft lead. Not that you can't pour with hard, but soft is easier. While your lead is heating up put the mold on top of the pot so it warms up nicely. Next I always pour a few with nothing in the cavities to heat up a bit more. This mold should pour pretty easy so I would think that is all that's needed. In some smaller molds or mold cavities with a lot of hardware in them I like to use drop out and that seems to help a stubborn mold fill nicely. Good luck and keep making cool stuff.