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Rifles, Reloading, Optics, Equipment
Reloading
Is there trick to loading 257 WM
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<blockquote data-quote="243winxb" data-source="post: 1419669" data-attributes="member: 97793"><p>Its more than light to midrange charges of powder that may be a problem. The slowes burn rate powders are not always good for light bullets, with little shank in the case necks.</p><p>Light neck tension may let the bullet move at primer firing, causing a pressure spike.</p><p>A magnum primer is a must.</p><p></p><p>From the link. The Collapsed Shoulder is in an old Speer manual. Light loads & slow powder are the cause. Use a faster burn rate of powder. Pressure is low & neck not expanding to seal. Make sure the bullets have enough neck tension. The expander should be .002" smaller than bullet diameter. This will keep the bullet from moving when the primer fires. What is your COL? The bullets bearing surface should be in full contact with the neck. If seating the bullet long to get close to the lands/rifling there may not be enough shank of the bullet in the case neck.</p></blockquote><p></p>
[QUOTE="243winxb, post: 1419669, member: 97793"] Its more than light to midrange charges of powder that may be a problem. The slowes burn rate powders are not always good for light bullets, with little shank in the case necks. Light neck tension may let the bullet move at primer firing, causing a pressure spike. A magnum primer is a must. From the link. The Collapsed Shoulder is in an old Speer manual. Light loads & slow powder are the cause. Use a faster burn rate of powder. Pressure is low & neck not expanding to seal. Make sure the bullets have enough neck tension. The expander should be .002" smaller than bullet diameter. This will keep the bullet from moving when the primer fires. What is your COL? The bullets bearing surface should be in full contact with the neck. If seating the bullet long to get close to the lands/rifling there may not be enough shank of the bullet in the case neck. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Is there trick to loading 257 WM
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