Almost built a 280 AI a few years back........had the Nosler brass......but never followed through with it.......

From what I read & understood......2 reamers were used.......wildcat & SAAMI......

FF'd brass vs Nosler formed brass..........just an FYI if not known......

http://www.redding-reloading.com/tech-line-a-tips-faqs/133-280-changes

https://faq.nosler.com/index.php?action=artikel&cat=31&id=39&artlang=en

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