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Too much crimp on this 6.5x55 round?

Discussion in 'Handloading and Reloading' started by Bear2000, Nov 4, 2009.

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  1. Bear2000

    Bear2000 Member

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    I'm experimenting with using the Lee Factory Crimp for 6.5x55 loads. This is a Lapua 139 Scenar over 45 gr of RL 19 at 3.06". The pictures aren't great, but maybe you can discern the crimp. Is it too much?
     

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  2. ole farmerbuck

    ole farmerbuck Member

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    My opinion is yes, its too much from what i see. But....i'm no expert.
     
  3. longdayjake

    longdayjake Member

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    Why are you crimping them? Are they going through a semi auto? Are you just trying to get more pressure? Deform the bullet? 6.5 caliber rounds should not need crimping since almost all are designed for high accuracy and crimping is going to change the bullet a little.
     
  4. NCsmitty

    NCsmitty Member

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    I do not crimp my 6.5x55 loads, even if the bullet has a cannelure. There is no need, IMO.

    That should be a good, fairly stiff load, especially if you're using a Swede Mauser.


    NCsmitty
     
  5. USSR

    USSR Member

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    Agree - No need to crimp the 6.5x55.

    Don
     
  6. Bear2000

    Bear2000 Member

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    Well, these will be going through the Mauser, but I am considering crimping for my hunting rifle (Tikka T3). Last season I did have a cartridge come apart on me in the field.

    Also, I was reading a fairly in-depth test of crimped rounds vs. uncrimped, and the verdict was that crimped were slightly more accurate. I thought I'd see for myself.
     
  7. flipajig

    flipajig Member

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    The only thing that i crimp are my lever guns and handgun rds depending on what rd depends on what crimp eather a roll crimp or a taper crimp..
     
  8. Sport45

    Sport45 Member

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    Sounds to me like you don't have enough case neck tension. Crimping really doesn't help that. How much bullet do you have in the neck? I suggest having at least 1 caliber for hunting ammo. Leave the " seating to the lands" for your benchrest loads.

    I don't crimp at all for my M1, AR, or Arisaka.
     
  9. Clark

    Clark Member

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    I crimped some 6.5x55 ammo 10 years ago, and I have been sorry ever since. It still sits here un fired.
     
  10. R.W.Dale

    R.W.Dale Member

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    Not so fast

    other folks could be crimping 6.5x55 for the same reason I crimped 6.5swede.......



    To be fed to the SEMIAUTOMATIC ag42-b , a rifle that's extremely hard on cartridges being fed into the chamber


    Either way I for one would love to see the outcome of the OP's crimp vs noncrimped test
     
    Last edited: Nov 4, 2009
  11. Bear2000

    Bear2000 Member

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    I will put the crimped rounds through the Tikka, which will be able to handle the additional pressure, and see if there's any difference in group size. But I'm convinced - these are the first and probably last five rounds I'll crimp. I wonder if I just wrecked five new Lapua cases!
     
  12. longdayjake

    longdayjake Member

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    Probably didnt ruin them. After firing they will expand and you can trim them down to normal specs again. Crimping doesnt usually hurt the brass too bad.
     
  13. rcmodel

    rcmodel Member in memoriam

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    Then you have an over-size expander button, or an over-size sizing die.

    Neck tension alone should make it totally impossible for a round to come apart without a bullet puller.

    rc
     
  14. Walkalong

    Walkalong Moderator

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    Yep, definitely a neck tension problem, but crimping for a semi auto is not a bad idea.
     
  15. Walkalong

    Walkalong Moderator

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    You have a Ljungman? SWEET!

    Saw a fello shooting one at the range one day. Instant love. :)
     
  16. R.W.Dale

    R.W.Dale Member

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    I HAD one

    in the end she prooved too fickle a mistress (oiled ammo & undersized American brass) and was too expendable when I broke my arm (motorcycle) so she got sold off
     
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