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Rifles, Reloading, Optics, Equipment
Reloading
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<blockquote data-quote="Bullet bumper" data-source="post: 745011" data-attributes="member: 17844"><p>Look forward to the photos </p><p>If your bullet seats all the way down in the neck you will not see a wasp waist like my bullets . This phenomenon is not linear , it's not predictable , it's variable and inconsistent , but it does happen. I have even seen split necks . </p><p>There is many factors that increase or decrease the severity of stress corrosion .</p><p>We only need to know it can happen .</p><p>What my crude test proved was that Moly coating a bullet reduced the bad effects and that stress corrosion in brass does exist .</p><p>The shoulder in your ammo wrinkled because the neck tension was higher than the strength of the shoulder .</p><p>If the case necks are a bit dirty when an uncoated bullet is seated then as the brass does age it only takes a few thou shrinkage to increase neck tension dramaticly . I think reloaded ammo with no bullet sealer / lube or crimp is more prone to this than New Military ammo because oxygen and moisture in the air can get in over time . However even the Army likes to use up it's small arms ammo after about 7 years or so.</p></blockquote><p></p>
[QUOTE="Bullet bumper, post: 745011, member: 17844"] Look forward to the photos If your bullet seats all the way down in the neck you will not see a wasp waist like my bullets . This phenomenon is not linear , it's not predictable , it's variable and inconsistent , but it does happen. I have even seen split necks . There is many factors that increase or decrease the severity of stress corrosion . We only need to know it can happen . What my crude test proved was that Moly coating a bullet reduced the bad effects and that stress corrosion in brass does exist . The shoulder in your ammo wrinkled because the neck tension was higher than the strength of the shoulder . If the case necks are a bit dirty when an uncoated bullet is seated then as the brass does age it only takes a few thou shrinkage to increase neck tension dramaticly . I think reloaded ammo with no bullet sealer / lube or crimp is more prone to this than New Military ammo because oxygen and moisture in the air can get in over time . However even the Army likes to use up it's small arms ammo after about 7 years or so. [/QUOTE]
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Reloading
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