Too much crimp on this 6.5x55 round?


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Bear2000
November 4, 2009, 08:44 PM
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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ole farmerbuck
November 4, 2009, 08:48 PM
My opinion is yes, its too much from what i see. But....i'm no expert.

longdayjake
November 4, 2009, 09:19 PM
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.

NCsmitty
November 4, 2009, 09:19 PM
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

USSR
November 4, 2009, 09:27 PM
Agree - No need to crimp the 6.5x55.

Don

Bear2000
November 4, 2009, 09:30 PM
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.

flipajig
November 4, 2009, 09:31 PM
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..

Sport45
November 4, 2009, 10:20 PM
Last season I did have a cartridge come apart on me in the field.


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.

Clark
November 4, 2009, 10:37 PM
I crimped some 6.5x55 ammo 10 years ago, and I have been sorry ever since. It still sits here un fired.

R.W.Dale
November 4, 2009, 11:48 PM
Agree - No need to crimp the 6.5x55.

Don

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

Bear2000
November 5, 2009, 05:41 AM
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!

longdayjake
November 5, 2009, 09:30 AM
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.

rcmodel
November 5, 2009, 10:58 AM
Last season I did have a cartridge come apart on me in the field.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

Walkalong
November 5, 2009, 11:12 AM
Yep, definitely a neck tension problem, but crimping for a semi auto is not a bad idea.

Walkalong
November 5, 2009, 11:14 AM
To be fed to the SEMIAUTOMATIC ag42-b

You have a Ljungman? SWEET!

Saw a fello shooting one at the range one day. Instant love. :)

R.W.Dale
November 5, 2009, 12:44 PM
You have a Ljungman? SWEET!

Saw a fello shooting one at the range one day. Instant love. :)


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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