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<p>[QUOTE=&quot;springfld.arsenal, post: 321217, member: 54&quot;]Short of a serious math error, I used the density of steel, 7.6 g/cm3 as the multiplier for the volume to get that weight which I couldn’t relate to the abbreviations on the cannon.&nbsp; Since I’m taking someone else’s word, which could be a guess, that the whole barrel is made of steel, they could be mistaken.&nbsp; Working backwards, a metal with a density a little over 11 (eleven) g/cm3 would put things in better agreement.&nbsp; Silver, lead, ...?.&nbsp; But the trunnion with the strange weight number on it is almost certainly steel.&nbsp; Both trunnions were likely pressed or screwed or soldered in to make the basic cylindrical tube “much less work” than needing to turn off a large amount of metal.&nbsp; The dolphins were also additions to the basic tube.&nbsp; The big bronze cannons this tiny one represents were cast in one pour;&nbsp; normally nothing on them except perhaps a front sight blade, was added.[/QUOTE]</p><p><br /></p>

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