Originally Posted by jsthntn247
Trimmed brass measures 2.007 after firing it is 2.017. It's growing 10 thou with only bumping .001??
Every .308 Win case I've fired has been shorter (head to mouth) by about .003" after firing. But they do lengthen almost .004" after full length sizing bumping the shoulder back about .002"; they grow near .001" each time. This is with standard SAAMI spec chambers and across 6 different full length sizing dies.
Both my 30 caliber magnums did the same thing except about .001" more, probably due to a bigger case.
So, I think you rifle chamber may be a bit on the big size. Is it a factory chamber?
What cartridge is this happening with?