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Rifles, Reloading, Optics, Equipment
Reloading
280AI trim length
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<blockquote data-quote="woods" data-source="post: 504687" data-attributes="member: 6042"><p>Hey J E</p><p></p><p>I think you're getting Hornady and Nosler confused. Nosler is the only manufacturer that offers 280AI brass and ammunition. Nosler is the one who coordinated with Remington custom shop to spec the drawings.</p><p></p><p>Here is what the additional headspace from Nosler 280AI brass will do if fired in an older dimensioned chamber</p><p></p><p><img src="http://img.photobucket.com/albums/v663/bwestfall/RELOADING/Picture017.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Now flattened primers is not the end of the world if it is due to a little extra headspace and not pressure, so I decided to go ahead and fire and use these. Perhaps they will have more thinning at the pressure ring but I will keep an eye on that.</p><p></p><p>mm242 you will probably not have any issues with a newer 280AI firing the 280AI brass or 280 Rem brass, the problem should only surface in older chambers with the 280AI brass.</p><p></p><p>muleyman when the Nosler tech said Nosler didn't have any intention on changing the brass it could be because the drawing with the headspace change happened in 2008</p><p></p><p><a href="http://www.saami.org/PubResources/CC_Drawings/C%20and%20C%20Dwgs%20-%20TOC%20-%20Rifle.pdf" target="_blank">http://www.saami.org/PubResources/CC_Drawings/C and C Dwgs - TOC - Rifle.pdf</a></p><p></p><p>and the drawings were probably submitted for a period of time before that. They were probably producing the 280AI brass at the new dimensions for 5 years at least and maybe all of their brass has been at the new dimensions. So he was essentially saying "Nosler is right and we ain't changing nuthin!" kinda thing. Typical.</p><p></p><p>What puzzle me a little is that with the reduced headspace of ~.014", the 280 Rem brass should have a bigger crush fit than was typical in the older 280AI. Used to be there was only an allowance of ~.003" crush fit on the 280 Rem brass but in the new SAAMI chambers it should now be .017". Guess even that much is not much of a problem for a bolt action.</p><p></p><p>IMO Remington figured out that they had poor quality control on the dimensions of their 280 Remington Remington brass and they were not getting the crush fit deemed necessary for forming to a 280AI. So rather than straighten up their act and put out more consistant brass, the Remington custom shop decided to add the headspace to absolutely confirm the crush fit on their proprietary brass. Then when Nosler asked them, Remington gave Nosler the dimensions of their 280AI custom shop chambers. 50 years of tradition down the drain.</p></blockquote><p></p>
[QUOTE="woods, post: 504687, member: 6042"] Hey J E I think you're getting Hornady and Nosler confused. Nosler is the only manufacturer that offers 280AI brass and ammunition. Nosler is the one who coordinated with Remington custom shop to spec the drawings. Here is what the additional headspace from Nosler 280AI brass will do if fired in an older dimensioned chamber [IMG]http://img.photobucket.com/albums/v663/bwestfall/RELOADING/Picture017.jpg[/IMG] Now flattened primers is not the end of the world if it is due to a little extra headspace and not pressure, so I decided to go ahead and fire and use these. Perhaps they will have more thinning at the pressure ring but I will keep an eye on that. mm242 you will probably not have any issues with a newer 280AI firing the 280AI brass or 280 Rem brass, the problem should only surface in older chambers with the 280AI brass. muleyman when the Nosler tech said Nosler didn't have any intention on changing the brass it could be because the drawing with the headspace change happened in 2008 [url]http://www.saami.org/PubResources/CC_Drawings/C%20and%20C%20Dwgs%20-%20TOC%20-%20Rifle.pdf[/url] and the drawings were probably submitted for a period of time before that. They were probably producing the 280AI brass at the new dimensions for 5 years at least and maybe all of their brass has been at the new dimensions. So he was essentially saying "Nosler is right and we ain't changing nuthin!" kinda thing. Typical. What puzzle me a little is that with the reduced headspace of ~.014", the 280 Rem brass should have a bigger crush fit than was typical in the older 280AI. Used to be there was only an allowance of ~.003" crush fit on the 280 Rem brass but in the new SAAMI chambers it should now be .017". Guess even that much is not much of a problem for a bolt action. IMO Remington figured out that they had poor quality control on the dimensions of their 280 Remington Remington brass and they were not getting the crush fit deemed necessary for forming to a 280AI. So rather than straighten up their act and put out more consistant brass, the Remington custom shop decided to add the headspace to absolutely confirm the crush fit on their proprietary brass. Then when Nosler asked them, Remington gave Nosler the dimensions of their 280AI custom shop chambers. 50 years of tradition down the drain. [/QUOTE]
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