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Post by GLSHOOTER on May 4, 2019 12:17:02 GMT -8
A chamber for the 243 LBC shoulder starts at 1.150. Have you done a case capacity on fired brass check on yours? In mine using Lapua brass I get 35.2-36.17 depending on what batch of brass I am using. Greg I measured one case=36.3 (flat meniscus).
The shoulder for the 243LBC AR without the 40 deg shoulder starts at: 1.150 which is the same your 243 LBC.
Whitley's version of the 243 LBC is almost identical in chamber dimensions inmost area. That shoulder doesn't pick up much but then movement forward does. As you can see it was not dramatic but every CC counts..LOL One of the biggest things we see is lot to lot and brand to brand case capacity variations. Greg
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Post by stevepodleski on May 4, 2019 13:57:51 GMT -8
in 0.010 deeper, nominal, to adjust for less bolt face depth. ...Which extractor do you use. The Young Mfr bolt come without an extractor.
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Post by GLSHOOTER on May 4, 2019 14:29:27 GMT -8
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Post by stevepodleski on May 4, 2019 15:02:02 GMT -8
Thanks
what threw me off was the pic comparing two bolts without extractor.
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Post by stephen243 on May 28, 2020 17:10:59 GMT -8
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Post by GLSHOOTER on May 28, 2020 18:44:45 GMT -8
That's what I'm shooting in several LBC's. Greg
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