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1916 Model 1912 20ga chamber length and reloading
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January 6, 2024
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January 6, 2024 - 2:09 pm
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Greetings from Norway, a shotgun this old has a chamber made for 2,5″ shells, right?

If I took the barrel to a gunsmith, would it be possible to make the chamber accept 2-3/4″ shells (lead), or do the newer models have a thicker barrel/better steel?


I’ve found 3″ Cheddite 20ga 16mm brass shells (I would have to cut them down to length), CX2000 primers, WAA20 wads (and fiber wads), and Hodgdon powder available, so reloading seems like a possible way to keep my heirloom “alive”.

Loading data for a 2,5″ shell seems rare, can anyone help or point me in the right direction?



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January 6, 2024 - 5:01 pm
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Hello Marty,

Yes, an unaltered 1916 production Model 1912 20-ga gun has a 2.5″ chamber length.  A skilled gun smith can open up the chamber (ream it longer), and also open up the ejection port (to allow a fired 2.75″ shell to cleanly eject). That stated, if you have the ability & means to load your own original length shells, that is what I recommend doing.


WACA Historian & Board of Director Member #6571L

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January 6, 2024 - 7:30 pm
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Ah, yes, I did not think about the other changes that would be needed to use a longer cartridge, a VERY good point.

I think it will stay as it was made then, thanks Bert

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