Having spent the morning blatting away with my trusty Garand I gathered up the empities and took them back home to dump in the tumbler. As usual I had a quick look at the cases before dropping them in the bowl, and discovered the case pictured below.Pictured from left to right are a Prvi Partisan unfired 30-06, a healthy fired Prvi case and the holey case. These are froma batch of 1000 rds most of which have been fired without any problems. I have never seen anything like it before, 7 craters going all the way through the case wall and no idea what caused it. Any ideas from the more informed Arrsers?