I just bought a used McGowen barrel in 6BR. It is an 8 twist.
Anyway, on the chamber end there are some numbers stamped. The 243 is obvious, as is the 8. But it is also marked 237. Can anyone tell me what that is measuring?
I just bought a used McGowen barrel in 6BR. It is an 8 twist.
Anyway, on the chamber end there are some numbers stamped. The 243 is obvious, as is the 8. But it is also marked 237. Can anyone tell me what that is measuring?
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