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Rifles, Reloading, Optics, Equipment
Reloading
Sticky Bolt on 7mm mag
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<blockquote data-quote="Ackley Man" data-source="post: 494834" data-attributes="member: 16583"><p>I am not sure where your load data came from but Hodgdon lists a max load of 68.0 grains with a 175 Nosler Partition producing 51,200cup pressure. The 180gr long ogive Bergers that you are using differ from the Noslers in a couple of ways - they reduce the case capacity due to the amount of bullet seated into the case and the long ogive causes more resistance. Thus the pressure will increase. The max load that you should be safely using is 66.4 grains which will yield 2849fps from a 26" barrel with a case fill ratio of 101%. You may indeed have a pressure problem but it is strange that it is isolated to only a few cases. Again, you need to take a series of measurements from the problematic cases. Here is a link to the SAAMI spec drawings of the chamber and case for comparison purposes. </p><p><a href="http://www.saami.org/PubResources/CC_Drawings/Rifle/7mm%20Remington%20Magnum.pdf" target="_blank">http://www.saami.org/PubResources/CC_Drawings/Rifle/7mm Remington Magnum.pdf</a></p></blockquote><p></p>
[QUOTE="Ackley Man, post: 494834, member: 16583"] I am not sure where your load data came from but Hodgdon lists a max load of 68.0 grains with a 175 Nosler Partition producing 51,200cup pressure. The 180gr long ogive Bergers that you are using differ from the Noslers in a couple of ways - they reduce the case capacity due to the amount of bullet seated into the case and the long ogive causes more resistance. Thus the pressure will increase. The max load that you should be safely using is 66.4 grains which will yield 2849fps from a 26" barrel with a case fill ratio of 101%. You may indeed have a pressure problem but it is strange that it is isolated to only a few cases. Again, you need to take a series of measurements from the problematic cases. Here is a link to the SAAMI spec drawings of the chamber and case for comparison purposes. [URL]http://www.saami.org/PubResources/CC_Drawings/Rifle/7mm%20Remington%20Magnum.pdf[/URL] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Sticky Bolt on 7mm mag
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