Good point Brian. As a rule of thumb, if you fill a container with spherical objects they will occupy about 75% of the volume. This is a field of mathematics called "sphere packing" that has been researched by people like Kepler and Gauss. It is often encountered in these types of situations where you are trying to combine two materials to produce an aggregate mixture. steve Steve R. M-15 #119 Lexington, KY ----- Original Message ---- Sent: Friday, February 10, 2006 8:08 PM Subject: RE: M_Boats: Re: Epoxy pricing & sources That is correct for one sphere, but a bunch of spheres piled on eachother will allow room for even less resin. At any rate your CG will be lower with lead shot than steel shot. I wonder if it would be better to put the resin in first and let the lead shot sink into it? Brian M15 #421 ----- Original Message ---- Sent: Friday, February 10, 2006 4:17:54 PM Subject: RE: M_Boats: Re: Epoxy pricing & sources Out of curiosity, I compared the volume of a sphere to that of a cube (that circumscribes the sphere) and the difference is even greater than I expected. The sphere fills up just over half of the cube (52%). Of course, those interstices would be filled w/ resin, but since the density of resin is so much less than lead.... Tod M17 #408 BuscaBrisas <=== sporting factory-installed lead ballast, thankfully.