Your seating die is set too low and pushing the shoulder back as you seat your bullets. Raise the die up and then turn the seating pin down to get the bullet depth back. You're over crimping the necks and that's pushing the shoulders back.
Whatever it is, that is way too much crimp. I never crimp bottleneck cartridges bullets for a bolt rifle until you're getting into big magnum or Nitro Express cartridges..
Don’t you guys read what is already posted before you comment?
I load by the 10’s of thousands and it isn’t a guess at what the problem is!
