243winxb
Member
This guy used a valve spring tester. .. PSI and Pounds , very different i think?neck tension or bullet pull
I used a bathroom scale, to push bullets into the case.
The 5.56 needs 35 lbs minimum bullet pull. About .002" neck tension in my test.
The 45acp , different brands of brass , from 45 lbs to past 100 lbs. Neck tensions from .002" to .005"