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Rifles, Reloading, Optics, Equipment
Reloading
Crimping Belted Magnum Loads… to do or not to do?
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<blockquote data-quote="LoneTraveler" data-source="post: 1524811" data-attributes="member: 77249"><p>CRIMP OR NOT TO CRIMP. Is a real open discussion.</p><p>Factories and Military cartridges is crimped with a purpose in mind. </p><p>If you have the neck real tight on a cartridge for handling and storage, The neck will stress under tension and split. Factory ammo necks are not real tight and use a crimp to hold the bullet. It is part a retail pleaser, We would not buy ammo if we opened a box of shell in the store and case necks was split. </p><p>The Armed forces want crimped ammo for storage and the rough handling, Like air drop and dump out delivery. When I was in Europe in 1962 our base load of battle ammo was dated 1943-44. It still shot and worked proper through M-1 and M-1 carbines.</p><p></p><p>Bullet movement at the time of primer ignition could be a reason for crimping. If the bullet will move a little it would change case volume and powder burn rate. Some rifles will not shoot accurate till the bullet is in the lands so the bullet will not move.</p><p>Pistol bullets need to be crimped, 1. So pressure will build quick in short barrels. 2. So bullets can not move in magazine or cylinder and lock the gun. </p><p>Lead rifle bullets need crimp for handling and holding the bullet in case until shot.</p><p></p><p>Guns remind of my X wife, Figure out what works, "Then Don't try to change it, Just Do It That Way," Or you will regret it.</p></blockquote><p></p>
[QUOTE="LoneTraveler, post: 1524811, member: 77249"] CRIMP OR NOT TO CRIMP. Is a real open discussion. Factories and Military cartridges is crimped with a purpose in mind. If you have the neck real tight on a cartridge for handling and storage, The neck will stress under tension and split. Factory ammo necks are not real tight and use a crimp to hold the bullet. It is part a retail pleaser, We would not buy ammo if we opened a box of shell in the store and case necks was split. The Armed forces want crimped ammo for storage and the rough handling, Like air drop and dump out delivery. When I was in Europe in 1962 our base load of battle ammo was dated 1943-44. It still shot and worked proper through M-1 and M-1 carbines. Bullet movement at the time of primer ignition could be a reason for crimping. If the bullet will move a little it would change case volume and powder burn rate. Some rifles will not shoot accurate till the bullet is in the lands so the bullet will not move. Pistol bullets need to be crimped, 1. So pressure will build quick in short barrels. 2. So bullets can not move in magazine or cylinder and lock the gun. Lead rifle bullets need crimp for handling and holding the bullet in case until shot. Guns remind of my X wife, Figure out what works, "Then Don't try to change it, Just Do It That Way," Or you will regret it. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Crimping Belted Magnum Loads… to do or not to do?
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