Mistake. Back in 1969 I was getting into reloading. I took my first reloaded rounds out to the gun range to see if they would go, "bang". The first 2 shots fired just fine. On the 3rd round I felt it kicked kinda hard and instantly felt something hot on my face. I brushed my face and saw some small flecks of brass on my fingers!!! I tried the bolt and it wouldn't budge! Then I looked through the scope, (Redfield-Widefield duplex) and both horizontal crosshairs were hanging down! That night our local gunsmith took a mallet to the bolt handle and thumped it until it came loose. Then he took a small hammer and beat the case off the bolt. To this day I don't know what happened. Some guys thought, "double-load" but, you can't get the much 4320 in a .270 case. I still count my blessing everytime I look at the case.