Case separation

[bsekf]

I am still having trouble with case separation with my 7-08AI Encore. I do not believe I am bumping the shoulder back to far to change the headspace, I am measuring the case length with the chamber. What are other causes of case separation. These are 2-4 times fired Nosler 308 cases that have been necked down and fireformed.

Bill

 

[fivering]

Bill:
Get yourself a set of Stoney Point Head Space Gages and a dial caliper.
Using the correct Stoney Point Gage, measure 2-3 of fired cases.
Resize the cases and measure again.
You should only have to set the shoulder back 1 1/2 to 2 thousandths.
If you are in the 5 thousandths or over range, the brass is probably junk.