Hi Rob
Thanks for your reply. When I was writing the post last night, I simply guessed at what the gun might be. To take up your point, the gun in the photo is an iron gun, I know the pictures are a tad over exposed which is slightly surprising because I was using the reliable auto setting on my P880.
Your comment about always being bronze has got me thinking so I had a look on Google and some of my reference books this morning.
The Age of SailJudging from the above Patrick O'Brian might be guilty of confusing the issue because he refers to the bow chasers on Surprise as being brass and they may well have been but gives the impression that all long nines were the same.
I have a distant memory of visiting the NMM and seeing an iron cannon on display outside and being impressed that I was actually looking at a long-nine chase gun.
From what I have read this morning, I believe that there were probably more iron long nines than brass and because of weight distribution I guess that if a Captain could acquire brass chasers then they would be better in the bows of a ship.
This is what I like about the forum, as well as the build side of things it keeps me thinking about the detail of the historical side. That's why I choose to build 18th century warships rather than more modern ships.
Mike T