First of all I will start off by saying ALWAYS were eye and ear protection when shooting 100% of the time!!! ( As we all do). I was shooting in a varmint match today and just got done firing the 600 yd. bank of steel targets. So far all is well the Hornady 75 gr. match ammo. I was using. We then started on the 500 yd string, as I was two rounds into this string and fired on the third shot - BOOM..I was blasted in the face with powder and brass particles. Hoping I was not seriously injured, my spotter who was my shooting partner for the day checked me over and told me I had a few puntcure wounds and a trickle of blood from each hole. Wow was I relieved this is all that I received along with powder burns from this case explosion. The empty case would not extract from the chamber so it had to be removed with a cleaning rod from the muzzle end. As you can see by the pictures to the extractor my shooting day was over at this point. Primer was never found. Can anyone tell me why this case failed? Also if you have any ammo from this lot number this is a caution to you.