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Greg Moisi
07-21-2026, 07:55 AM
Good morning, was wondering if all baker SBT guns had 2 1/2 inch chambers. thanks

Drew Hause
07-21-2026, 12:47 PM
The Baker Gun & Forging SBTs were introduced in 1909, and I don't believe any gun had 2 1/2" chambers unless ordered as such. Does your gun have 2 1/2" chambers??
Scroll down to the bottom here for more information
https://docs.google.com/document/d/1zR9cn008zfbEsyaynA_u8sf9wHI6ItVi0msn2alC9ek/edit?tab=t.0

allen newell
07-21-2026, 03:55 PM
Growing up and shooting live native birds with my cousin. He shot a very nice Baker 16 ga. And killed more native pheasants than me. I've have periodically offered to buy it from my cousin who inherited it but to no avail.

Dave Noreen
07-21-2026, 08:27 PM
The 12-gauge Baker SBT's might have 2 5/8-inch chambers intended for 2 3/4-inch shells, but more likely 2 3/4-inch chambers. For 1907 our ammunition manufacturers went to 1 1/4-ounce 12-gauge loads only being offered in 2 3/4-inch or longer shells. Also, for most of the time from then until WW-II while hunting 1 1/8-ounce 12-gauge loads came in the 2 5/8-inch shell, those marketed as "Trap Loads" came in 2 3/4-inch cases.

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Dave Noreen
07-21-2026, 09:15 PM
No mention of chamber length in the two Baker catalogs I have that include the SBTs.

1911 --

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1915 --

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Greg Moisi
07-21-2026, 09:33 PM
Thanks guys, I was thinking on getting one I seen buy it had 2 1/2" chambers.

Dave Noreen
07-22-2026, 09:37 AM
By who and how was the measurement made? If the chamber is just slightly tight a gauge made to "industry standards" will measure short. The machinist's scale method can be more accurate.

Daryl Hallquist
07-23-2026, 07:39 AM
I measured 9 Baker single barrel trap guns. One early one, ca. 1910 , and one late one, ca. 1919, had 2 3/4" chambers, the 7 others had 2 1/2" chambers . I used one of the plug gauges , I think from Galazan some decades ago . Oddly, most of the double barrel higher grade 12 ga. Bakers from that era had 2 3/4" chambers.

Dave Noreen
07-23-2026, 12:00 PM
Would a 12-gauge chamber that actually measures 2 1/2-inch be intended for 2 5/8-inch shells? Our U.S. ammunition manufacturers did not regularly offer a 12-gauge 2 1/2-inch paper shell. From the 1890s to WW-II our U.S. ammunition manufacturers offered 12-gauge paper shells in 2 5/8-, 2 3/4-, 2 7/8- and 3-inch lengths. As I mentioned above, from 1907 onwards all 1 1/4-ounce loads were only offered in 2 3/4-inch or longer cases and 1 1/8-ounce loads marketed as "Trap Loads" were also in 2 3/4-inch cases --

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For a while before WW-I there were also 3 1/4-inch 12-gauge cases offered for bulk smokeless powder. I've yet to see a box of such loaded shells, but have seen these NPEs --

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