Turning 30 06 Brass In To 270 Win Can It Be Done?

Discussion in 'Reloading' started by schwabdog, Jan 21, 2013.

  1. schwabdog

    schwabdog Well-Known Member

    Messages:
    156
    Joined:
    Jun 9, 2012
    i was just looking for some 270 win Lapua Brass, and found noting but they make 30 06 so could i just let it threw a 270 win Die set???
    has any one done this, and has it worked..
    thanks..
     
  2. FEENIX

    FEENIX Well-Known Member

    Messages:
    9,806
    Joined:
    Dec 20, 2008

  3. Trickymissfit

    Trickymissfit Well-Known Member

    Messages:
    4,072
    Joined:
    Jun 11, 2010
    you can do it, but it's really a chore when done right. You'd be better off with virgin 35 Whelen brass. You'll need to expand the necks out to pretty much a strait wall case and then start necking it down in steps (probably at least one anneal when you get the necks back down to around an 8mm I.D.). When you get the necks down to 7mm you may want to anneal one more time. I would set the headspace about .010" too long, and the very carefully bring the shoulder down to where the headspace is correct. After that you'll have to fire form the brass and then trim it to the correct length. I can only think of one case design that would be harder at the moment, and that's a 30 Meyer made out of a .284 case. The 35 degree shoulder is a killer!
    gary
     
  4. Edd

    Edd Well-Known Member

    Messages:
    2,395
    Joined:
    Jan 26, 2011
    Why do you need to do all this? A 270 neck is longer but the case is the same length to the shoulder and has the same headspace length and shoulder angle as the 06. There isn't going to be any length to trim because the formed case is going to be short. The neck might be a little thick but depending on the chamber it could be ok too.
     
  5. Edd

    Edd Well-Known Member

    Messages:
    2,395
    Joined:
    Jan 26, 2011
    I havent done this but I neck down 280 Rem cases to a 243 neck in one step without any issues.
     
  6. boomtube

    boomtube Well-Known Member

    Messages:
    1,595
    Joined:
    Oct 8, 2007
    "...could i just let it threw a 270 win Die set??? "

    Certainly, it's a straight forward process. Lube the lower part well and push it in, pull it out, trim the length if it's needed (probably won't) and you're done.

    It would be helpful for case life to anneal the new necks but if you anneal improperly and over heat them (to a visible red glow) they will be too soft and lose all bullet grip. Do a web search on 'case annealing' for lots of tips.
     
  7. Trickymissfit

    Trickymissfit Well-Known Member

    Messages:
    4,072
    Joined:
    Jun 11, 2010
    actually I was wrong, as I was simply crunching numbers in the top of my head. You cannot make a 270 case out of a 30-06 case. The 270 is about .046" longer than the 30-06 case. Also there is a difference in the headspace numbers even if they used the same case length. On the otherhand you could use a .280 Remington case to get it done. (2.540" verses 2.494")
    gary
     
  8. Trickymissfit

    Trickymissfit Well-Known Member

    Messages:
    4,072
    Joined:
    Jun 11, 2010
    the reason you expand the neck before down sizing it is to create a new headspace and shoulder position. I knew already that the .270 and the 30-06 had a different headspace number to prevent somebody from shooting a 30 caliber round thru a 277 barrel. I'd guess it's more than the fall of a firing pin.
    gary
     
  9. Edd

    Edd Well-Known Member

    Messages:
    2,395
    Joined:
    Jan 26, 2011
    The headspace length is exactly the same on a 30-06 and a 270.

    I think the 30-06 cartridge is going to stop chambering into a 270 chamber long before the headspace length comes into play.

    Even if there was a difference in headspace, such as with a 280, a 30-06 neck is big enough to create a false shoulder without being expanded.
     
  10. Trickymissfit

    Trickymissfit Well-Known Member

    Messages:
    4,072
    Joined:
    Jun 11, 2010
    yes they have the same shoulder deminsion, and if you pull the SAMMI drawings up they show the same basic gauge line deminsion. But they also use a .375" gauge line on both cases. OK that'll work, but also will put the bushing very close to the radius at the neck & shoulder (.10" radius). On the otherhand the .270 has a .150" radius at the same place. But you could use the larger bushing on the 270 and xcreate a gauge line number for your own use.

    Now what you have not said is how does one plan on getting by with a neck that starts out .039" too short, plus manage to add .043" to the neck and shoulder without expanding the necks out? If you know a way then there's going to be a lot of unhappy folks in the forming die business
    gary
     
  11. Edd

    Edd Well-Known Member

    Messages:
    2,395
    Joined:
    Jan 26, 2011
    You don't have to do anything to the shoulder, it comes out correct. As I said in my first post, where you were talking about trimming, the formed case will be short. It will be short on neck length only.
     
  12. boomtube

    boomtube Well-Known Member

    Messages:
    1,595
    Joined:
    Oct 8, 2007
    schwabdog, find someone who will give you a fired .30-06 case and run it into your .270 die to see for yourself. You will find a perfectly functional .270 case comes out but it will probably be a little bit short; that won't make your gun blow up nor will your bullets hit the ground before they get to 100 yards. And you'll have the cases you need.
     
  13. Lefty7mmstw

    Lefty7mmstw Well-Known Member

    Messages:
    4,280
    Joined:
    May 13, 2012
    Tricky, the reformed '06 brass shoots just fine in a 270; half of my 270 brass in really '06 brass. The neck length will come up somewhat short, but it'll get there after a few firings. Yes, there will be a bit of a secondary shoulder when you neck them down if your dies are set to your rifle and will just help with closer headspace on the fireforming shot. Really no different than setting your belted mag dies to your chamber and firing your brass in the rifle before you get serious with that brass.
     
  14. Trickymissfit

    Trickymissfit Well-Known Member

    Messages:
    4,072
    Joined:
    Jun 11, 2010
    there's no doubt you can form the basic .270 Winchester out of 30-06 brass. I don't think anybody's saying you can't. But you end up with a case neck that's about .040" short. That'll work just fine as the .270 neck is pretty long anyway. But here's my one worry. Ever seen a 22 rimfire barrel that's had a ton of 22 short shot thru it? The chamber is ruined from errossion. Now the .270 has a much hotter flame path and of course much higher chamber pressures. I see nothing but a short throat life, but on the otherhand the guy with the .270 isn't going to be shooting a lot of rounds anyway.

    So I'll conceed the argument, and call it a day
    gary