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Rifles, Reloading, Optics, Equipment
Reloading
Help with fireforming a wildcat
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<blockquote data-quote="fguffey" data-source="post: 1859826" data-attributes="member: 113511"><p>I have never loaded for a chamber before determining the length of the chamber from the shoulder/datum to the bolt face. The only advantage I can gain by measuring the length of the chamber is a tight fit between the case and chamber. My opinion, there must be something going on that we do not understand.</p><p></p><p>Necked down: Are you assuming the crush fit is caused by a long case (from the datum to the case head) in a short chamber; point, case head separation does not happen with a crush fit. There are methods and or techniques that are not practiced by reloaders when determining what happens to the case when fired. I have one rifle with .016" clearance between the shoulder of the chamber and shoulder of the case when fired; never a case head separation. </p><p></p><p>I have fired 8MM57 ammo in two of my 8MM06 rifles, that is .127" clearance between the case shoulder and shoulder of the chamber. No case head separation; to understand what happens to those cases is to understand where the neck does when fired.</p><p></p><p>I did have trouble with a model 70 Winchester with a 300 Win Mag chamber (very long story). The rifle got back to Winchester, they had it for a long time etc etc. and then they returned the rifle in a new box. I thought my ammo chambered with difficulty, the problem was just the opposite. They returned the rifle 14 years ago, I have yet to take it to the range. </p><p></p><p>F. Guffey</p></blockquote><p></p>
[QUOTE="fguffey, post: 1859826, member: 113511"] I have never loaded for a chamber before determining the length of the chamber from the shoulder/datum to the bolt face. The only advantage I can gain by measuring the length of the chamber is a tight fit between the case and chamber. My opinion, there must be something going on that we do not understand. Necked down: Are you assuming the crush fit is caused by a long case (from the datum to the case head) in a short chamber; point, case head separation does not happen with a crush fit. There are methods and or techniques that are not practiced by reloaders when determining what happens to the case when fired. I have one rifle with .016" clearance between the shoulder of the chamber and shoulder of the case when fired; never a case head separation. I have fired 8MM57 ammo in two of my 8MM06 rifles, that is .127" clearance between the case shoulder and shoulder of the chamber. No case head separation; to understand what happens to those cases is to understand where the neck does when fired. I did have trouble with a model 70 Winchester with a 300 Win Mag chamber (very long story). The rifle got back to Winchester, they had it for a long time etc etc. and then they returned the rifle in a new box. I thought my ammo chambered with difficulty, the problem was just the opposite. They returned the rifle 14 years ago, I have yet to take it to the range. F. Guffey [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Help with fireforming a wildcat
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