300 rum case length question

C

Chas1

Guest
one source states case length at 2.860 another source states case length at 2.850. Does anyone know the correct length. My fired cases(Remington factory ammo never reloaded) are measuring 2.8430 on 2 different calipers...one of which is brand new...so i'm inclined to believe my caliper measurement. That being said the cases are .007 to .017 short depending on which source is correct if either are. Shouldn't they be longer such that they would need to be trimmed back into spec...isn't that what case length trimmers are for?
 
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