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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need help on fire forming 280AI brass
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<blockquote data-quote="yawn" data-source="post: 1208765" data-attributes="member: 13540"><p>This 280ai Saami thing is becoming farcical. It seems to get the blame for all and every problem with the 280ai.</p><p></p><p>Initially the claim was the new SAAMI spec was .014 shorter than the traditional and nosler cases were stretching in a traditional ackley chamber. Now the saami spec is longer causing case head separation with factory ammunition? Seriously?</p><p></p><p>Longboelk it seems you have a poor chambering job with excessive headspace or some other variant of the 280 improved. I would certainly have it checked. I have a hunch your are not alone and at least some of the controversy could be attributed to the same poor chambering.</p><p>Re the mystical .014 difference in the SAAMI spec</p><p> This is the best actual physical test I can find and their explanation as to why the chambers drawings show a difference is quite plausible. Also read the comments at the bottom. </p><p> <a href="https://gunsmithtalk.wordpress.com/2012/07/17/280-ackley-improved-emperical-headspace-test/" target="_blank">https://gunsmithtalk.wordpress.com/2012/07/17/280-ackley-improved-emperical-headspace-test/</a></p><p> </p><p> Nosler explain here in their FAQ , note the date , its well after all the controversy hit the internet. Also of note is the statement that" the decision was made to honor Mr. Ackley's original design intent by headspacing the cartridge such that standard 280 Remington ammunition would chamber with slight (.003"/.004") crush at the shoulder/neck intersection and fire form into the Ackley chamber without the need to seat the bullet into the rifling."</p><p><a href="http://faq.nosler.com/index.php?action=artikel&cat=32&id=39&artlang=en" target="_blank">Nosler FAQ - The 280 Ackley Improved</a></p><p> </p><p>Ill add Im just finishing up some actual physical measuring of my own. Initial results all in line with the gunsmithtalk findings. IE a chamber perfectly headspaced to P O Acklys .004 shorter than the parent case that is a perfect fit for noslers saami spec brass. If this .014 difference exists anywhere other than the chamber drawings Im yet to find it.</p></blockquote><p></p>
[QUOTE="yawn, post: 1208765, member: 13540"] This 280ai Saami thing is becoming farcical. It seems to get the blame for all and every problem with the 280ai. Initially the claim was the new SAAMI spec was .014 shorter than the traditional and nosler cases were stretching in a traditional ackley chamber. Now the saami spec is longer causing case head separation with factory ammunition? Seriously? Longboelk it seems you have a poor chambering job with excessive headspace or some other variant of the 280 improved. I would certainly have it checked. I have a hunch your are not alone and at least some of the controversy could be attributed to the same poor chambering. Re the mystical .014 difference in the SAAMI spec This is the best actual physical test I can find and their explanation as to why the chambers drawings show a difference is quite plausible. Also read the comments at the bottom. [url]https://gunsmithtalk.wordpress.com/2012/07/17/280-ackley-improved-emperical-headspace-test/[/url] Nosler explain here in their FAQ , note the date , its well after all the controversy hit the internet. Also of note is the statement that" the decision was made to honor Mr. Ackley’s original design intent by headspacing the cartridge such that standard 280 Remington ammunition would chamber with slight (.003”/.004”) crush at the shoulder/neck intersection and fire form into the Ackley chamber without the need to seat the bullet into the rifling." [url=http://faq.nosler.com/index.php?action=artikel&cat=32&id=39&artlang=en]Nosler FAQ - The 280 Ackley Improved[/url] Ill add Im just finishing up some actual physical measuring of my own. Initial results all in line with the gunsmithtalk findings. IE a chamber perfectly headspaced to P O Acklys .004 shorter than the parent case that is a perfect fit for noslers saami spec brass. If this .014 difference exists anywhere other than the chamber drawings Im yet to find it. [/QUOTE]
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Need help on fire forming 280AI brass
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