Originally Posted by steve4102
I have proven it to myself. I have several Lee Collet dies. Many of them right out of the box did not supply enough neck tension to hold the bullet secure. It was very easy to push the bullet deeper into the case.
A quick call to Lee and the problem was solved. They suggested I polish the mandrel down or purchase one of their "reduced" mandrels. They told me that not all brass is created equal and some brass is more elastic than others and some has more spring back than others. Especially brass that has been fired many times. The reduced mandrel squeezes the neck down a thou or two more to compensate for brass spring back.
Do you regularly anneal your brass?
In the 30+ years that I've reloaded.I've never had any neck tension problems with any dies,especially Lee's,unless the brass needed to be annealed.
I rarely ever crimp any bullets,and don't have any problems with any bullets being freely moved by hand in the necks,but I also always anneal my brass after 3-5 firings.It all depends on the caliber/loads that I'm pushing rather fast.