Re: Denser core material?
I have seriously considered getting set up to swage my own bullets in the past. Trust me, Tungsten powder would have found its way into some of them.
The simple advantage is this:
BC's are not a function of the length of the bullet. They are primarily a function of the tip, ogive, base and weight of the bullet for a given caliber. Melt the lead out of a 240 SMK, pack it full of Tungsten powder so that it weighs 300 grains and its BC will jump from around .711 to .89--while remaining exactly the same shape. While remaining exactly the same length.
To make a pure copper bullet that heavy it would be so long you would never stabalize it. Even if filled with lead such a bullet would be too long to be practical.
An aerodynamic shape is important, of course, but the more weight you can put behind that shape the higher its BC will be.
Unlike most sites, most on this site know how important a high BC is....