dmax2002

Purchased a new savage bolt action 17hmr yesterday. I took it out today to get sighted in. I was shooting a half used box of Remington 17 grain bullets. Let me start by saying that the first half of this box went through my Marlin 917 without any problems. I tried loading a round in my savage after having fired a few shots and found that it would not chamber all the way. I was like what the ****. There must have been a dead round in the box and when the primer fired it shot the bullet about a quarter inch into the barrel. Good thing I was'nt able to shoot another bullet into it. I had ear plugs screwed almost to the brain so i did not notice the difference in the shot compared to the others. I hope the dead round was just a fluke and not a problem for the future. I also noticed that the rounds that I did fire had split cases. I don't recall that the marlin had split cases with this ammo. What would cause one rifle to split cases and one not to?