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Scorch · August 20, 2014, 01:48 AM

You most likely have a 2-9/16" chamber. 2-3/4" 16 ga was an American improvement and was not around before 1940. If it has been modified, it is fairly obvious, if you know what to look for. It is not too difficult to do the conversion, I have done several of these. The chamber has to be reamed to accept 2-3/4" shells, the forcing cone lengthened, the ejector has to be changed to the sliding type (like the 20 ga 3" magnums), the port has to be enlarged to 2-3/4", and the forend has to be modified to let the barrel sit 3/16" farther forward. All in all, about 4 hours worth of work. I used to have a really pretty 1927 A5 in 16 ga (sliding safety, solid rib, like yours) that I converted and hunted with, I later sold to my brother.

August 20, 2014, 01:48 AM	#7
Scorch Senior Member Join Date: February 13, 2006 Location: Washington state Posts: 15,248	You most likely have a 2-9/16" chamber. 2-3/4" 16 ga was an American improvement and was not around before 1940. If it has been modified, it is fairly obvious, if you know what to look for. It is not too difficult to do the conversion, I have done several of these. The chamber has to be reamed to accept 2-3/4" shells, the forcing cone lengthened, the ejector has to be changed to the sliding type (like the 20 ga 3" magnums), the port has to be enlarged to 2-3/4", and the forend has to be modified to let the barrel sit 3/16" farther forward. All in all, about 4 hours worth of work. I used to have a really pretty 1927 A5 in 16 ga (sliding safety, solid rib, like yours) that I converted and hunted with, I later sold to my brother. __________________ Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services