Having problems with flecks of dross/dirt in the projectile surface after lead-casting LEE ingots and some .308 rifle bullets.
Material is bulk linotype bar from an old newspaper source and very hard indeed.
I have fluxed 8 times and still get the dross appearing, leading to a 60% rejection rate from my 10lb Lee Production bottom-pour leadpot.
I am using 'Blue and Grey' flux powder using a "bubbling" deep incertion method used by the old newspaper workers. Allox and paraffin wax also was tried [in desperation.]
Stirring and scraping with a small perforated spoon also was used to raise the dross from the bottom of the pot. Refining is improving the metal clarity - but it is taking ages to get 10lb to work with.
What have I done wrong? Should I refine it comprehensively before (EG in a larger gas pot) before it is used in a smaller furnace ?
Any ideas from other casters welcome.
Material is bulk linotype bar from an old newspaper source and very hard indeed.
I have fluxed 8 times and still get the dross appearing, leading to a 60% rejection rate from my 10lb Lee Production bottom-pour leadpot.
I am using 'Blue and Grey' flux powder using a "bubbling" deep incertion method used by the old newspaper workers. Allox and paraffin wax also was tried [in desperation.]
Stirring and scraping with a small perforated spoon also was used to raise the dross from the bottom of the pot. Refining is improving the metal clarity - but it is taking ages to get 10lb to work with.
What have I done wrong? Should I refine it comprehensively before (EG in a larger gas pot) before it is used in a smaller furnace ?
Any ideas from other casters welcome.