Some of use tin. Some of us don't. Its ungodly expensive. A pound will do about 10.5 pots.
https://www.midwayusa.com/product/1010251753?pid=724445
https://www.rotometals.com/tin-cut-w...d-made-in-usa/
Its normally scrounged and upcycled from salvaged pewter, but there's a few links for commercial sources.
Add to the pot at 1% to 2%. You got him the 10lb pot so thats 1.5 to 3 ozs per a full pot. Its highly recommended for beginners to use tin to help them get good bullets easier. I personally rarely add tin now unless I have stubborn alloy.
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