Thread: See separation?

Originally Posted by sneeze

I tested the annealing theory of holding the case in your fingers some time back. Using tempilaq I couldnt get the neck past 400 f before it became to hot to hold, this was on a 280ai case. So it wasnt achieving anything.
The candle theory was worse, all it did was cover the neck in soot and burn my fingers Iv also tested the base of all my cases with tempilaq on the base with a automated flame anneal er, with the necks indicating 750 F I been happy letting them cool at room temp for many years.
The case length gauge insert is an easy way to check for trim length. @Tahr you are welcome to borrow this one in .284 if needed. Just trim the neck of a sized case back. Fit the insert then chamber, it will push the insert into the case indicating the max length, I normally trim 10-15 tho shorter.

Attachment 131611

Don't forget to drill out the primer pocket so that you can easily punch the insert out once measurement taken.