My barrel is a 5.56 nato 1-9 twist i have a mil spec m16 bcg.
Yes that was a typo my measured OAL is 2.256.
Using a decapped casing and a bullet i got a measurement of 2.400.
My current powder charge is 23.4gr and i cant hear the powder rattle in the shell anymore.
Thankyou uncle nick i shall remeasure my powder charges and lable and take notes.
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