Home Forums Hunting & Shooting Ask The Gunwriters 280 Ackley SAAMI vs. 280 Improv 40 deg pre-SAAMI

Getting back to the question of using Nosler factory brass in an 280 Rem Ack. Imp. 40 degree (pre SAAMI chamber). In an adundance of caution I always size new Nosler factory brass up to .308 cal. and size back down to .284 cal. leaving a false shoulder. This results in a loaded round that gives slight but noticeable resistance when closing the bolt. I have never experienced and problems with excessive headspace using this method. It adds a couple of steps to the process but gives me confidence that my loaded rounds are safe. I use Redding dies marked 280 Rem. Ack. Imp. 40 degree which were made around 1993. I have never fired Nosler 280 Ack. Imp. factory rounds in either of my rifles so I cannot comment on how that works.