I just got a Forster concentricity guage and put it to work, I had loaded a run of 308 recently and was checking bullet runout. I got varying readings, some good and some as bad as .015 out. I think I have tracked the source to a loose decapping rod in my sizing die. Has anyone had this problem before? I had finger tightened the locking knurled nut when it worked loose, but it seems I should have put a little more on it, like light pliers. Some of these cartriges are so bad that the bullet waggles visually (.015) when the cartrige is rolled on a smooth surface. I am wondering if I should shoot them and fire form the brass and try again or if I should pull them and salvage the FMJ and the powder, and scrap the brass. I love that new tool, wish I would have gotten it sooner...![]()