Kingmt is right the Lee "Decap Mandrel" is a rigid one piece unit and is not adjustable. Here is the way the neck sizer works. It punches out the primer then stops. At that point, per directions, you are required to put considerable force on the press (up to 25 lbs) to complete the sizing. Because of this, it is hard to tell if the resistance is typical or a too tight flash hole. After reading all your answers along with the quote from Lee, I'm convinced that it is the too small flash hole, probably in the Lellier & Bellott ammo. The second one that broke was probably pulled out of the mandrel because it was stuck so tightly in the hole, I couldn't get it out. I had assumed they broke off, but now I believe they simply pulled out. So, I'm going to throw out the L&B brass and stick with the Winchester only. Thanks to all who wrote. It is enormously helpful to have you all available to guide me.
