I'm new to reloading rifle. Today in the mail I received a Lyman case length headspace gauge. I resized/deprimed a dozen or so 223 on an Orange Crusher SS with a full length Dillon die. BTW, One Shot worked awesome. I started the die about 3/16" from the shell holder. The cases would not gauge at all. I slowly inched the die closer to the shell holder until the cases passed the gauge test (according to the instructions). By the time the die was low enough to correctly size a case it was practically touching the shell holder. It rested about 1/64" above it. So I resized a dozen or so cases. After I was finished I checked them with the case gauge. About 1/5 of them would not completely fall into the gauge. My question is why is this happening, and is it bad to use the cases that won't case gauge. Until today I have been firing cases that obviously wouldn't gauge so I assume that you can fire them, but I'm not completely sure. Do you guys have any light to shed on my situation?