umm need advice on neck tension

Discussion in 'Reloading' started by Freedom2live, Sep 21, 2013.

  1. Freedom2live

    Freedom2live Banned

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    Welll folks loaded up some 7mm mag and headed at to range (50) rds.. everything went great except for 3 rds that I touch the bullet and it moved. . Looks like neck tension were loose, but I full sized every single one of them.. its not super loose just enough to push down the bullet.. Question is were these safe to fire ???

    Would it blow up since not enough pressure??
     
  2. tbrice23

    tbrice23 Well-Known Member

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    Have you annealed any of those cases?
    (Were the bullets .277". JUST KIDDING)
     

  3. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    I had that (the sliding bullets thing) happen once with win brass and 140 accubonds in my 7stw ammo. I killed an antelope at 300 yards with those rounds (only ammo I had with). Turns out the brass was a bit thin necked for my dad's redding stw dies. Got another set of dies and all is well. If I had collet dies I'd have simply stepped down a collet.
    Zero neck tension will change the load a bit from what heavier neck tension will do for you, but the biggest problem lies in the fact that the pill can shift; if you get one at the lands and one set back from recoil the accuracy will go to pot. The one at the lands will likely also have higher pressure as it has no run to the lands.
     
  4. Freedom2live

    Freedom2live Banned

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    Dear friend thanks for the reply...
     
  5. backwoods83

    backwoods83 Well-Known Member

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    If this is the first time its happened using the same dies, ANNEAL your brass!
     
  6. Freedom2live

    Freedom2live Banned

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    Yes this is the first time... I bought 100rd of federal brass.. how would I go about annealing brass ??
     
  7. backwoods83

    backwoods83 Well-Known Member

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    A benchsource annealer or the oldschool way of a 600* paste, a handheld torch, and a cordless drill. Google it, there are several methods.
     
  8. Mikecr

    Mikecr Well-Known Member

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    If your FL sizing included expansion, which it should, then the last thing you need is annealing -for low bullet grip.

    Tell us the rest of the story. Why are your sized necks too big.
     
  9. tbrice23

    tbrice23 Well-Known Member

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    No one has asked him how many times the brass has been resized? 10 or more he might need annealing?
     
  10. Mikecr

    Mikecr Well-Known Member

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    That's right. We don't have enough information to make the call.
    How many times, and how much are the necks being sized?
    Is there an expander in the die, or necks expanded otherwise?
    What are the fired neck diameters?
    What are the sized neck diameters?
    What are the loaded neck diameters?
     
  11. backwoods83

    backwoods83 Well-Known Member

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    Well you guys are right, there needs to be more info but I naturally assumed (yeah I know) that if he has been using the same sizing die over and over with no prior issues, that he has work hardened his brass and it has lost some of its grip, but there could be other explanations.
     
  12. tbrice23

    tbrice23 Well-Known Member

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    I think he's gone.
     
  13. Freedom2live

    Freedom2live Banned

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    Sorry folks, its been a long painful weekend. .
    A buddy friend passed away and I dont get emails when someones replies to my post..

    This brass is new federal brass...never fired. When I opened the bag I noticed a couple of brass necks out of shape, so I run them thru fl sizing.. went to cabelas and bought winchester brass. It looks better than federal brass.
     
  14. tbrice23

    tbrice23 Well-Known Member

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    Very sorry for your loss.




    If I cant get lapua brass I use winchester with great results my last batch of 500 win. 7mag I sorted by neck thickness 42 were more than 1.5 thousands out of concentric and all weighed within 5 grains.