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Model 1912 Chamber Length
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Rube Burrow
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October 22, 2025 - 5:56 pm
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I have a 12ga. Model 1912 standard field grade, ser. #149XXX,( Nickel Steel – Mod. 1912 – 12ga. Full ) markings on barrel but no chamber length.

Do all the early 12ga. models have a 2 3/4” chamber?

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Bert H.
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October 22, 2025 - 6:00 pm
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Rube Burrow said
I have a 12ga. Model 1912 standard field grade, ser. #149XXX,( Nickel Steel – Mod. 1912 – 12ga. Full ) markings on barrel but no chamber length.
Do all the early 12ga. models have a 2 3/4” chamber?
  

Yes they do.  As did all of the Model 1897 12-ga guns.

Bert

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Rube Burrow
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October 22, 2025 - 6:17 pm
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Many thanks Bert! I thought the same but wanted to ask an expert.

Reason I ask is that I’m having trouble with empty shells hanging in the ejection port. I don’t see a problem with the extractor and I thought if it did have a shorter chamber the ejection port might also be slightly shorter than that of the port for a 2 3/4” chamber.

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Bert H.
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October 22, 2025 - 6:33 pm
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Rube Burrow said
Many thanks Bert! I thought the same but wanted to ask an expert.
Reason I ask is that I’m having trouble with empty shells hanging in the ejection port. I don’t see a problem with the extractor and I thought if it did have a shorter chamber the ejection port might also be slightly shorter than that of the port for a 2 3/4” chamber.
  

Most likely a weak or worn ejector spring.

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Rube Burrow
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October 22, 2025 - 7:00 pm
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Bert H. said

Rube Burrow said
Many thanks Bert! I thought the same but wanted to ask an expert.
Reason I ask is that I’m having trouble with empty shells hanging in the ejection port. I don’t see a problem with the extractor and I thought if it did have a shorter chamber the ejection port might also be slightly shorter than that of the port for a 2 3/4” chamber.
  

Most likely a weak or worn ejector spring.
  

If there was a gunsmith worth their salt in my area I’d get it looked at. Unfortunately, good, trustworthy gunsmiths are hard to find. Especially where I live.

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