What caliber is this barrel?

[nineteenhundred]

I have a Mk2 barrel that I got with my Mk3 kit from Sarco that I need to identify the caliber.
It has a flat chamber face and the number 1-7234 stamped on it.

Information

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[Lee Enfield]

I have a Mk2 barrel that I got with my Mk3 kit from Sarco that I need to identify the caliber.
It has a flat chamber face and the number 1-7234 stamped on it.

7.92x57 Mauser from a "Sterile" post-war Canadian Arsenals assembled BREN

[Sunray]

What did Sarco tell you it is when you bought it?
I'd slug the thing.

[csmarcher]

If you want a proper Mk 3 barrel I’ll trade you for the 7.92 one !!! I need a spare !!!!

[AmEngRifles]

Anybody you know with an 8x57 cartridge? Not for firing, but just to check the fit. Or buy a snap cap bullet in 8x57. Otherwise could it be a 7.62x51?

[nineteenhundred]

I ordered the Mk3 kit with no barrel, but the kit came with this barrel. I assumed it was a 303 until I read some of the posts on this site. I got an extra 303 barrel so I will hang on to this 7.92 barrel in case I want to do a conversion later. I did try a 7.62x51 to see if it fit, it did not.

[Kev G]

As per what Lee Enfield has said.
Another serial number to add to my data base :-) shame no one has the same s/n body to match it to.

[nineteenhundred]

If I were to sell it, what are they worth?

[csmarcher]

$29.95.....

I’ll buy it....😜😜😜

[Sunray]

"...it did not..." Shouldn't either. The rim and shoulder diameter is bigger than the 8mm Mauser.
Slugging the barrel will tell you exactly what its diameter is. Hammer a cast .30 cal bullet or suitably sized lead fishing sinker through the barrel and measure with a micrometer. .308" for the 7.62. .323" for the 8mm.