08-04-2021, 07:37 PM
I use a like method that works well for me. Take a fired case, leave in the primer, don't size it. Put in the amount of powder to be tested and use the bullet to test. It should slip in and out of the case neck and sit on the powder column with a small amount of finger pressure. Measure OAL and at that measurement is where compression begins. I leave a variety of unsized case on my bench for this purpose.