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Rifles, Reloading, Optics, Equipment
Reloading
210 bergers blowing up?? help 30-378 wby
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<blockquote data-quote="Fiftydriver" data-source="post: 109511" data-attributes="member: 10"><p>Roygeterdone,</p><p></p><p>How far are you seating the Bergers off the lands if any? I suspect if you are shooting out of a factory Wby you have a healthy dose of freebore to jump to the lands. </p><p></p><p>If this is the case, you will tear up the Berger jackets very quickly with this jump to the lands. It has to do with the bullet gainining linear velocity before it begins to rotate.</p><p></p><p>What happens is when the bullets slams into the lands, the front of the bullet begins to rotate but the rear of the heavy long bullet resists this rotation and the bullet is wringed out like a wet towel.</p><p></p><p>This dramatically weakens the jacket core bond and will at least degrade accuracy and in worst case will cause bullet failure.</p><p></p><p>If your jumping to the lands I suspect this is your problem.</p><p></p><p>If you seat the Bergers to touch or to be slightly into the lands this generally limits this problem up to about 3200-3250 fps but above that you will again see accuracy problems rear their head with the Bergers.</p><p></p><p>I would agree, a wildcat or sierra bullet will probably solve most of your problems but even then, if your jumping significantly to the lands you may have issues with these bullets as well at higher velocities though.</p><p></p><p>Good Shooting!!</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 109511, member: 10"] Roygeterdone, How far are you seating the Bergers off the lands if any? I suspect if you are shooting out of a factory Wby you have a healthy dose of freebore to jump to the lands. If this is the case, you will tear up the Berger jackets very quickly with this jump to the lands. It has to do with the bullet gainining linear velocity before it begins to rotate. What happens is when the bullets slams into the lands, the front of the bullet begins to rotate but the rear of the heavy long bullet resists this rotation and the bullet is wringed out like a wet towel. This dramatically weakens the jacket core bond and will at least degrade accuracy and in worst case will cause bullet failure. If your jumping to the lands I suspect this is your problem. If you seat the Bergers to touch or to be slightly into the lands this generally limits this problem up to about 3200-3250 fps but above that you will again see accuracy problems rear their head with the Bergers. I would agree, a wildcat or sierra bullet will probably solve most of your problems but even then, if your jumping significantly to the lands you may have issues with these bullets as well at higher velocities though. Good Shooting!! Kirby Allen(50) [/QUOTE]
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Reloading
210 bergers blowing up?? help 30-378 wby
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