I remember an article years ago (maybe Handloader or Rifle) about problems and techniques associated with casting small bullets. The author mentioned the size of the sprue relative to the size of the bullet base as being one of the factors in accuracy. The author solved the problem by positioning the sprue cutter off center where only a small part of the bullet cavity was visible through the hole in the sprue cutter. In other words the sprue would be a small and football shaped on the edge of the bullet base.
I seem to remember that the author was using gas checks so the tiny deformity being on the edge of the base didn’t cause a problem with the bullet “release” at the muzzle.
Last edited by navlav8r; 02/28/21.
