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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: 494509" data-attributes="member: 16583"><p><span style="color: black"><span style="font-family: 'Verdana'">Normally new brass has been sized at the factory to SAAMI minimum specs. Accordingly there probably was not a head space or case measurement problem with the brass that you bought. You indicated that you body sized the virgin brass before loading which may have moved the shoulder forward on a few pieces depending on your die dimension. Properly head spaced rounds should exhibit slight bolt lift resistance but not usually extraction resistance. There are a few things that may be causing the extraction resistance: bullets are actually seated out and engraving the lands but there is enough neck tension that the bullets are not being pulled from the cases, the cases have a severe concentricity issue, the cases have a diameter measurement issue, the rifle chamber is fouled or the loaded round neck diameter is tight in the chamber neck. I don't understand why you body sized the virgin cases and then did not chamber a few empty cases to check to see if the case shoulder to case base dimension was a good fit with the rifle chamber. Measure run-out on one of the rounds that you indicate is sticky when you chamber it. Particularly bullet run-out, case neck run-out and case body run-out. Compare a sticky round to a not sticky round by taking several case diameter measurements. Inspect the bullet ogive to be sure the bullet is not engraving the lands, clean and inspect the chamber, throat and follower. You should find your problem somewhere in the process. Hope this helps.</span></span></p></blockquote><p></p>
[QUOTE="Ackley Man, post: 494509, member: 16583"] [COLOR=black][FONT=Verdana]Normally new brass has been sized at the factory to SAAMI minimum specs. Accordingly there probably was not a head space or case measurement problem with the brass that you bought. You indicated that you body sized the virgin brass before loading which may have moved the shoulder forward on a few pieces depending on your die dimension. Properly head spaced rounds should exhibit slight bolt lift resistance but not usually extraction resistance. There are a few things that may be causing the extraction resistance: bullets are actually seated out and engraving the lands but there is enough neck tension that the bullets are not being pulled from the cases, the cases have a severe concentricity issue, the cases have a diameter measurement issue, the rifle chamber is fouled or the loaded round neck diameter is tight in the chamber neck. I don't understand why you body sized the virgin cases and then did not chamber a few empty cases to check to see if the case shoulder to case base dimension was a good fit with the rifle chamber. Measure run-out on one of the rounds that you indicate is sticky when you chamber it. Particularly bullet run-out, case neck run-out and case body run-out. Compare a sticky round to a not sticky round by taking several case diameter measurements. Inspect the bullet ogive to be sure the bullet is not engraving the lands, clean and inspect the chamber, throat and follower. You should find your problem somewhere in the process. Hope this helps.[/FONT][/COLOR] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Sticky Bolt on 7mm mag
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