  Bullet mold, maybe. 
The seller described this as a Confederate iron bullet mold.  Maybe, but my immediate thought on seeing it was that it looks more like a wire pulling die than a bullet mold, because each hole is in fact a hole all the way through.  On the other hand, in a wire pulling die typically each hole would be a bit smaller than the one before it, while these are all the same. 
If you know what this thing is, let me know. 
Source: eBay seller fsooff44 
Contributor: Theodore Gray 
Acquired: 8 April, 2009 
Text Updated: 9 April, 2009 
Price: $25 
Size: 6" 
Purity: 95%
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