I shot a few rounds today & everything seemed ok, chambered easily , no hard bolt life or extraction? When I got back home I decided I would resize the shells so they would be ready to load as I shot the rest. First shell I tried to run thru the sizer the head came off inside the dang sizer? I started to inspect the fired cases & noticed some big dents right below the shoulder & almost all cases looked like the were cracked above the belt wit black soot showing? They are Hornady cases & I believe that was there 4 loading and I had annealed them before loading. Some of the shells look like they have a very faint crack & some have carbon showing in the cracks, I`m surprised they didn`t separate when ejecting from rifle. What in the world is going on & any suggestions on getting the stuck shell out of my resizer die. Should I just scrap all the remaining brass that has not been loaded, I was well below max on all of them that cracked.