## Tutorial Description: ###### https://rumble.com/vu4z58-homemade-primers-chemical-grades.html ### Homemade Primers - Chemical Grades In this video - Marshall Thompson discusses the different chemical grades for rating quality. This information is useful when purchasing chemicals from various sources. Two of the lower quality grades should probably be avoided because although you may save a few dollars on the front-end - the results may require additional work testing, inspecting and perhaps requiring purification the material.