It sounds like you found some tin-based Babbitt bearings (there are lead-based ones, as well). These are not of particular use in muzzleloaders, except perhaps for alloying in making "hardened" balls for greater penetration. Everything that I can recall about conicals of all types suggests that one wants pure lead, or at most a small percentage of tin, with very little or (preferably) none of other elements like antimony, copper, zinc, etc. I did a quick web search, and found specifications for a "No. 4" tin-based Babbitt alloy of 80.5-82.5% Sn, 12.0-14.0% Sb , 5.0-6.0% Cu, and 0.35% (Max) Pb. http://www.alchemycastings.com/lead-products/babbitt.htm http://www.frymetals.com/pdf_uploads/referenceguide.pdftuscan said:came across white metal, aloy 4 bearings, casted some RB and r.e.a.l.s, they seam to be too hard.
70% pipe lead, 30% white metal.
pure r.e.a.l.s weight 200grs, my new ones 170grs.
Enter your email address to join: