Originally Posted by E-Rez
I started shooting a different box of ammo before the "faulty" box (started with 150 gr and switched to 130 gr after four shots). The 150 gr loads also show that the primer is going back into the firing pin hole.
I talked to my gunsmith over the phone and he said all the same things that have been brought up here. I will be taking it to him to look at tomorrow afternoon.
I did notice that in both boxes of ammo the ring around the firing pin dent and the ejector mark got worse as the gun heated up...
Tuner - the gun is two weeks old and has only had 10 rounds put through it today. I cleaned it after I brought it home and in between shots while breaking it in.
That pretty much rules out excessive fouling or damage to the bore! Primers are not necessairly a good indicator of pressure. A soft primer cup will show what could be interpreted as high pressure when in fact things could be normal; however, blown primers that happend in your first post is another story all together.
Your second box of ammo appears to be the same make, Federal and if it is the same Lot Number you have really not changed anything. It would be interesting to see what a box of Win. or Rem. ammo will do. Do you have any problems chambering a round? I can't imagine it happening but I suppose a manufacturer could have a barrel slip through that did not get throated and bullets were being jammed into the rifling causing excessive pressures.
I would hope you have a good smith, not just someone that sells guns and mounts scopes, to evaluate the rifle. I would personally contact both Savage and Federal, explain the age of the gun, number of rounds fired, what happend and email them pictures. Something is not right and one of the two needs to come up with the answer. I certainly hope you are wearing good safety glasses when you fire that rifle.
Please let us know the final answer you get.