280 ai

frankmorrow

Private
Minuteman
Apr 14, 2021
15
0
Kentucky
So I’m building a 280 ai I have 280 rem brass to fire form at the moment I only have a neck die? I’ve always fl re sized my brass for every other caliber I’ve ever owned can someone tell me will neck sizing be fine or do I need to be looking up a fl die also what’s advantages and disadvantages of neck only?
 

Steel head

Feral kitten
PX Member
Minuteman
  • Aug 3, 2014
    13,840
    36,424
    Washington
    You can’t neck size only in most situations.
    You could get a body die and use it every 2-3 reload but without an occasional pass through a body die you almost certainly going to get tight cases and feed and/or extraction issues.

    For the first few firings it’s would be fine as long as you’re pressures are normal.
     
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    Supersubes

    Heathen
    PX Member
    Minuteman
  • Sep 6, 2006
    6,026
    5,368
    Rural Nevada
    There's a difference between the original 280 Ackley, and Nosler’s .280 Ackley. The Nosler (saami) version is shorter at the neck/shoulder. You may need to move the virgin case shoulder with a die to get the bolt to close properly. A small amount of crush on the standard 280 case is a good thing for case forming, but dont over do it. Go get the FL die.
     
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    Steel head

    Feral kitten
    PX Member
    Minuteman
  • Aug 3, 2014
    13,840
    36,424
    Washington
    There's a difference between the original 280 Ackley, and Nosler’s .280 Ackley. The Nosler (saami) version is shorter at the neck/shoulder. You may need to move the virgin case shoulder with a die to get the bolt to close properly. A small amount of crush on the standard 280 case is a good thing for case forming.
    Good point.