a unknown cartridge was used in this punt with a snider action

John Padstone/Southampton, its coming from ireland some years ago.

I was making cases for this with once fired 23x152 Belted Russian machine gun steel cases. here with a 4 ga plastic shell

chamber measurments of the snider punt gun:
40mm rim
36mm base
33mm mouth
155mm length

another snider with a south african address "C.G.Bales" was sold some times ago. the pic here shows it have checkering and express sights whats is very unusual for a punt gun.
http://www.shutterstock.com/pic-95039119...africa-xix.html

http://www.shutterstock.com/pic-95039131...africa-xix.html