Rummaged through the local pet store chew toy bin and found another cheap suitable candidate for a priming horn. This one is made from antler, with a pine base plug and maple spout plug. I bought some carbide cutting bits to help hollow out the inside, which worked great. The “brad nails” are cut pieces of “survey flag” wire and are perfect for 1/16” drilled holes. These small horn projects have been a lot fun and great practice/experience without much expense.