Why would anyone take credence in your 'thunk' test when you don't even know how to adjust a seating/crimping die?
Perhaps you should learn a bit more about loading and designed barrel tolerances before you start giving advice.
Life is a little bit tragic but mostly magic... Learn to deal with the tragic and CHERISH THE MAGIC
A PACIFIST is someone who won't raise their hands to defend themselves...
A COWARD is someone who won't raise their hands to defend someone else.