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Rifles, Reloading, Optics, Equipment
Reloading
RELOADING FOR AN AR--.308 NON Crimp?
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<blockquote data-quote="SidecarFlip" data-source="post: 787414" data-attributes="member: 39764"><p>Rule of thumb is: </p><p> </p><p>If the projectile (bullet to you) has a crimp cannelure and you are magazine loading in a high recoil firearm, it's advisable to crimp the case mouth intoi the cannelure so the projectile don't move during recoil........ </p><p> </p><p>or in the case of select fire weapons, the multiple recoils of automatic fire can move the projectiles in the case mouths, hence they are crimped (case mouth) and the primers are crimped (the edge of the case head is rolled a bit inward.</p><p> </p><p>Having said that, I crimp all my loads, be it a cannelured projectile or not. However, excessive crimping an non-cannelure projectile can lead to excessive case pressure as well as work hardened brass so I don't advise crimping for anyone unless necessary (and the projectile has a cannelure).</p><p> </p><p>I use specific made crimp dies that are normally not used everyday btw.</p><p> </p><p>Typically, OFMB cases will have been crimped and primers locked and sealed in both 5.56 NATO and 308 7.62x51? NATO.</p></blockquote><p></p>
[QUOTE="SidecarFlip, post: 787414, member: 39764"] Rule of thumb is: If the projectile (bullet to you) has a crimp cannelure and you are magazine loading in a high recoil firearm, it's advisable to crimp the case mouth intoi the cannelure so the projectile don't move during recoil........ or in the case of select fire weapons, the multiple recoils of automatic fire can move the projectiles in the case mouths, hence they are crimped (case mouth) and the primers are crimped (the edge of the case head is rolled a bit inward. Having said that, I crimp all my loads, be it a cannelured projectile or not. However, excessive crimping an non-cannelure projectile can lead to excessive case pressure as well as work hardened brass so I don't advise crimping for anyone unless necessary (and the projectile has a cannelure). I use specific made crimp dies that are normally not used everyday btw. Typically, OFMB cases will have been crimped and primers locked and sealed in both 5.56 NATO and 308 7.62x51? NATO. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
RELOADING FOR AN AR--.308 NON Crimp?
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