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Reloaders - 7.62/308 Shoulder Expansion Info.

6K views 35 replies 11 participants last post by  Ole Silver 
Size your cases to around 0.004" under your rifle chamber headspace and you should be good. After firing your brass should come out all roughly the same cartridge headspace length. I found that measuring before and after firing and comparing the two cleared up a lot of mystery about headspace. The wild card in the M1A / M14 world is the effect of the forcefull ejection on the case, every rifle is different and will subject each ejected case to it's own version of torture.

John
 
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