Here is a link to the gun that was previously discussed on the board.
http://www.doublegunshop.com/forums/ubbt...20649#Post20649It looks like a nice english boxlock, with ejectors. No maker's name is present. Believed to be manufactured in Japan in the 20's or 30's.
The 16 gauge barrels are Spanish. I got them to practice rust blueing. I measured the centers at 25mm. The 12 gauge is at a 1 inch center (25.4mm), so the firing pins will be off .2mm or 0.0157in. I'm sure that would be close enough for the primers.
The underbite on the 16 gauge has enough material to be made into the same profile of the 12 gauge barrel. I cast the profile of the 12 gauge underbites into a polymer. I plan to use this as a rough guide to shape the 16 and then fit the final bit with hand fitting and lamp black.
Here are some photos of the 12 gauge.
http://i127.photobucket.com/albums/p159/baldferd/pix1686534173.jpghttp://i127.photobucket.com/albums/p159/baldferd/pix1686533767.jpghttp://i127.photobucket.com/albums/p159/baldferd/pix1933264001.jpghttp://i127.photobucket.com/albums/p159/baldferd/pix1686534251.jpghttp://i127.photobucket.com/albums/p159/baldferd/pix1686533970.jpghttp://i127.photobucket.com/albums/p159/baldferd/pix1933264267.jpghttp://i127.photobucket.com/albums/p159/baldferd/pix1933264204.jpg
