If you know someone that has a machine shop or is in the cutting tool industry, they could most likely get you used/scrap carbide endmills, drills or reamers that could be made to work at little to no cost. There are also carbide egg sinkers for fishing that can be bought in various weights and shapes that could work well also to replace the lead.
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"There are two kinds of hunting: ordinary hunting, and ruffed grouse hunting"-Aldo Leopold
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