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Joined: Sep 2010
Posts: 3,997
Campfire Tracker
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OP
Campfire Tracker
Joined: Sep 2010
Posts: 3,997 |
I bought some once fired 257 Rob brass a while back. When I inspected them a number of the primers were backed out .010-.015. Also when I PFL sized the cases they would not come anywhere close to fitting in my rifle and I had to bump the shoulder back about .010-.015. Do you think the rifle they had previously been fired in had excessive head space? After being sized to fit my chamber they worked fine but will I see decreased brass life?
I am continually astounded at how quickly people make up their minds on little evidence or none at all. Jack O'Connor
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Joined: Sep 2007
Posts: 26,524
Campfire Ranger
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Campfire Ranger
Joined: Sep 2007
Posts: 26,524 |
After being sized to fit my chamber they worked fine but will I see decreased brass life? What's done is done. Just neck size them from here out, and live with it.
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Joined: Jun 2001
Posts: 19,068
Campfire Ranger
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Campfire Ranger
Joined: Jun 2001
Posts: 19,068 |
I think you figured out your problem yourself.
If God wanted you to walk and carry things on your back, He would not have invented stirrups and pack saddles
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Joined: Nov 2014
Posts: 691
Campfire Regular
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Campfire Regular
Joined: Nov 2014
Posts: 691 |
"What caused this?"
Probably shot with a reduced load. The firing pin drives the case forward, there is not enough pressure to expand the case back to the bolt, but there is enough pressure to force the primer back against the bolt face. There might have been enough pressure to stretch the case to some extent.
You should watch out for case head separations. A bright ring, part way up the case where the thinner case walls begin, is the first warning sign.
Michael
Last edited by mag410; 03/03/15. Reason: clarification
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Joined: Oct 2004
Posts: 4,340
Campfire Tracker
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Campfire Tracker
Joined: Oct 2004
Posts: 4,340 |
Deals like this are where a $35 hornady head space measuring kit becomes really valuable. I could tell a number of stories about how its helped me analize once fired brass. Not to mention proper set up of my dies related to my own brass as it work hardens or I anneal. It is definately worth every penny for even low volume reloaders.
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Joined: Jan 2007
Posts: 11,483
Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2007
Posts: 11,483 |
Deals like this are where a $35 hornady head space measuring kit becomes really valuable. I could tell a number of stories about how its helped me analize once fired brass. Not to mention proper set up of my dies related to my own brass as it work hardens or I anneal. It is definately worth every penny for even low volume reloaders. + 1
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Joined: Feb 2010
Posts: 17,927
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 17,927 |
+ 1 minus whatever that modified case crap thing is. The inserts are handy.
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Joined: Jan 2007
Posts: 11,483
Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2007
Posts: 11,483 |
Yes I use the head space gauges for die set up and measure for possiable too much headspacein a new chamber, No modified case I use the sinlair "nut" type compator and case fired from said chamber
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