A few years ago, I built a shot maker similar to the Littleton and I made my own drippers. I've been successfully making #7-1/2 shot, using 1 part wheel weight and 5 parts range lead (lead salvaged from the indoor backstop at my local range).
Recently, a friend gifted me a set of #9 drippers. He ordered them from Oasis. I tried making some #9 shot using straight wheel weight alloy, but my shot is nowhere near #9, it's closer to #7-1/2. None of my pellets are perfectly round, so I can't give an actual measurement. I run my pot between 650-700 and I use liquid fabric softener as coolant. I keep the coolant as close to the ladle as I can, without actually touching it. I cast indoors, room temperature.
Does anyone have any suggestions on what I can try to get my pellets to drop smaller??