Lead Information for Hunters. Department of Natural Resources, Minnesota.  October 07, 2008.Information discovered last spring indicates that small lead fragments often are present in hunter-harvested venison, particularly ground venison. As a result, the Minnesota DNR conducted the first-of-its-kind lead fragmentation study to simulate how different types of bullets commonly used for deer hunting might fragment. [ See ] View also the DNR’s Bullet Fragmentation Study.