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Rifles, Reloading, Optics, Equipment
Reloading
primers flattening with no other signs of pressure?
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<blockquote data-quote="freddiej" data-source="post: 2043758" data-attributes="member: 26227"><p><h4>[USER=52437]Bigeclipse[/USER],</h4><p>By your description and your picture I can tell you what is wrong here. If no other person has verified this, your headspacing is too deep (AKA excessive head space) or your dies are set too short for your chamber. what is happening since this happens alot with guns that come into the shop, is your primer upon detonating is slipping partially from the primer pocket and then is being reseated with the powder charge and the stretching of the brass.</p><p> </p><p>here is a list of events in order: your firing pin sends your cases to the shoulder, the primer detonates, the primer slips out to the breach-face (slightly bulging), then the cartridge because of the power of the powder charge slams back against the breach-face making that distinctive primer look. </p><p>The remedy is set your dies to fill your chamber better. this is done by using a resized case and a seated primer. after firing and extracting from your chamber: measure the primer's protrusion after it's been fired in your chamber. </p><p>put a feeler gauge between the bottom of your sizing die and your case holder and adjust it accordingly. </p><p>that distinctive primer will disappear.</p></blockquote><p></p>
[QUOTE="freddiej, post: 2043758, member: 26227"] [HEADING=3][USER=52437]Bigeclipse[/USER],[/HEADING] By your description and your picture I can tell you what is wrong here. If no other person has verified this, your headspacing is too deep (AKA excessive head space) or your dies are set too short for your chamber. what is happening since this happens alot with guns that come into the shop, is your primer upon detonating is slipping partially from the primer pocket and then is being reseated with the powder charge and the stretching of the brass. here is a list of events in order: your firing pin sends your cases to the shoulder, the primer detonates, the primer slips out to the breach-face (slightly bulging), then the cartridge because of the power of the powder charge slams back against the breach-face making that distinctive primer look. The remedy is set your dies to fill your chamber better. this is done by using a resized case and a seated primer. after firing and extracting from your chamber: measure the primer's protrusion after it's been fired in your chamber. put a feeler gauge between the bottom of your sizing die and your case holder and adjust it accordingly. that distinctive primer will disappear. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
primers flattening with no other signs of pressure?
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