08-12-2020, 12:32 AM
(08-11-2020, 10:35 PM)Lemonaid Wrote: As an interim measure I would recommend using an empty sized fired case with a slit in the neck down to the shoulder to check where the bullets are touching the lands (insert bullet with fingers into case, gently chamber and extract). You can get to within a thou or two with multiple tests. A kinetic bullet puller will aid if the neck tension is too much for fingers to pull out the bullet.
I had done this already with the 16” proof barrel
I was getting a measurement of 2.255 - 2.2610” when the bullet hits the lands (so very close).
Apparently the forces imparted on the round during live fire are moving the bullet into the lands ....