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Rifles, Reloading, Optics, Equipment
Reloading
Fire forming
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<blockquote data-quote="Seabeeken" data-source="post: 2207518" data-attributes="member: 68015"><p>The rounded shoulders are a lack of pressure to fully form them. Ackley said to use a snappy load to form. A fast powder is a good way to do this.</p><p>Take a sharpie and color in the neck shoulder junction of a case with bullet in place and chamber it. If the sharpie is worn at the junction when removed, it is headspaced fine for forming. Some are not very tight and need to have the bullet jammed a bit to hold the case head against the bolt face to keep the brass from flowing from the rear of the case during fire forming.</p><p>the case should get shorter after forming because as the body moves out and shoulder moves forward, it pulls brass from the front of the case. If it doesn't get shorter, then The brass flowed from the back which could lead to a head separation. I've seen this before. The case should be a snug fit when closing the bolt as others have said. Ackley would set barrels back .004" to create this condition. Enjoy the 25-06 ai, it's a good one.</p></blockquote><p></p>
[QUOTE="Seabeeken, post: 2207518, member: 68015"] The rounded shoulders are a lack of pressure to fully form them. Ackley said to use a snappy load to form. A fast powder is a good way to do this. Take a sharpie and color in the neck shoulder junction of a case with bullet in place and chamber it. If the sharpie is worn at the junction when removed, it is headspaced fine for forming. Some are not very tight and need to have the bullet jammed a bit to hold the case head against the bolt face to keep the brass from flowing from the rear of the case during fire forming. the case should get shorter after forming because as the body moves out and shoulder moves forward, it pulls brass from the front of the case. If it doesn’t get shorter, then The brass flowed from the back which could lead to a head separation. I’ve seen this before. The case should be a snug fit when closing the bolt as others have said. Ackley would set barrels back .004” to create this condition. Enjoy the 25-06 ai, it’s a good one. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Fire forming
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