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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
cooper 280 ai
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<blockquote data-quote="yawn" data-source="post: 1025371" data-attributes="member: 13540"><p>Hey Jerry,</p><p> I know what you are saying here and in normal circumstances I would say that is very good advice. But given the confusion that surrounds this topic I think its a good idea to think about it a little and apply some simple logic. </p><p>The OP, 8andbait and myself seem to have the same chamber. That is we can fire nosler saami 280ai brass with minimal stretching .002 and .000 in my case. </p><p>So with all things being as they should, that leaves us with two possibilities. </p><p></p><p>1, there is no difference between the old and the new and the guys that posted this are correct.</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>If that is the case then any factory 280 rem ammo or brass or factory nosler 280ai brass or ammo will be fine as per PO Ackleys intentions. </p><p></p><p>Or 2, there is a .014 thou difference and we three have the shorter saami chamber. If that is the case then its supposedly .014 shorter than the original making the Nosler saami spec 280ai brass and ammo a good fit, but more to the point all standard 280 rem brass and ammo will be longer making it a tighter fit (.018 crush) and leaving no room for any possible case stretch.</p><p> The only possibility of case stretch would be using the supposedly shorter nosler 280ai product in a chamber that is longer than the saami and ignoring best fire forming practice.</p></blockquote><p></p>
[QUOTE="yawn, post: 1025371, member: 13540"] Hey Jerry, I know what you are saying here and in normal circumstances I would say that is very good advice. But given the confusion that surrounds this topic I think its a good idea to think about it a little and apply some simple logic. The OP, 8andbait and myself seem to have the same chamber. That is we can fire nosler saami 280ai brass with minimal stretching .002 and .000 in my case. So with all things being as they should, that leaves us with two possibilities. 1, there is no difference between the old and the new and the guys that posted this are correct. [url]https://gunsmithtalk.wordpress.com/2012/07/17/280-ackley-improved-emperical-headspace-test/[/url] If that is the case then any factory 280 rem ammo or brass or factory nosler 280ai brass or ammo will be fine as per PO Ackleys intentions. Or 2, there is a .014 thou difference and we three have the shorter saami chamber. If that is the case then its supposedly .014 shorter than the original making the Nosler saami spec 280ai brass and ammo a good fit, but more to the point all standard 280 rem brass and ammo will be longer making it a tighter fit (.018 crush) and leaving no room for any possible case stretch. The only possibility of case stretch would be using the supposedly shorter nosler 280ai product in a chamber that is longer than the saami and ignoring best fire forming practice. [/QUOTE]
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