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> Reloading 280 AI
Reloading 280 AI
@ 02:36 am (GMT) |
Lane SalvatoGuys,Do any of you resize 30-06 brass to 280 or 280 AI? I have a great 280 AI that I acquired right before the big run on ammo and I can't find brass. I've got all the other components. Do any of you resize 30-06 or 270 brass to 280? If so is there some publication on the steps to do that? I don't think Nathan covers it in his book. I wouldn't expect him to as that is quite a lot of detailed information. Thanks for any help. |
Replies
@ 07:27 am (GMT) |
Nathan FosterRe: Reloading 280 AIHi Lane, hope all is well with you and your family.Yes, .30-06 brass is fine. The main concern is the .280 shoulder and the need to avoid case head separations. Method 1: Simply neck the cases down to 7mm, but when doing so, make sure that you size the neck just a bit at a time, checking the fit in the chamber of your rifle. The case needs to be sized in such a way that most of the neck is sized down to 7mm while leaving a false shoulder at the original neck diameter. The cases should fit tightly in your chamber when fire forming (i.e. some effort to close the bolt). Method 2: From memory, you have a .338 Win Mag. That being so, you can neck the brass up to .338 and then back down to 7mm, repeating the steps in method 1. This will create a larger / more positive shoulder. The brass should ideally be annealed either before (if you have poor temperature control) or after (if you have access to a well controlled system) but one can get away without this if need be (a high ES may be an indicator of issues later on / a need to anneal). If you want to, you can seat your fire forming loads (bullets) in such a way that they are wedged about .020 into the lands. This will also help to keep the case positioned in the chamber. You will want to use a long 160 or 162gr bullet for this. Trail Boss is good for fire forming though any of the start loads in the ADI manual will work including 38gr H4895 (2200 to 2300fps), 39gr Varget, 46gr H4350, 51gr H4831sc. With both methods, the case will end up a bit short. No worries here, just let the case grow. But do keep the chamber of the rifle clean. Use a .30 cal bronze brush and Hoppes or carbon remover (spiral this around the neck section) to remove the build up of carbon in the neck area of the chamber as a result of the short trim (its just a little ring of carbon). If carbon builds up, it will muck up your pressures, velocity, accuracy etc. Just needs to be scrubbed during your regular cleaning sessions or soaked and scrubbed once in a while (e.g. after 30-40 rounds) if you are not performing regular cleaning and are instead simply lubing / swabbing the bore after a shooting session. OK, hope that helps a bit. Manuals: https://www.ballisticstudies.com/Knowledgebase/Hand+loading+manuals+and+reduced+load+data.html |
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@ 12:17 pm (GMT) |
Lane SalvatoRe: Reloading 280 AIThank you Nathan! Hope you guys are doing great. |
@ 06:16 pm (GMT) |
Christopher HowseRe: Reloading 280 AIIf you need headstamped brass I could see if I can send it from Australia.I have 50 new but I could see if I can source more. I have a .289ai my latest acquisition. But it's not high volume use so I don't need a ton of cases. I estimate it could be around $200 to replace and post a box. Exchange rate being similar that's a ballpark figure. |
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