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Author Topic: To crimp or not?  (Read 480 times)

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Offline HuntMeister

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To crimp or not?
« on: July 29, 2009, 03:24:57 PM »
Greetings all!

I am getting ready to load up some .243WSSM ammo with Hornady SST bullets. These will be fed thru a bolt gun. The SST does have a cannelure, do I need to crimp them or not?

Thanks in advance for the advice.
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Offline mjbgalt

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Re: To crimp or not?
« Reply #1 on: July 29, 2009, 03:28:12 PM »
nope. i have fired a zillion centerfire rifle rounds. zero crimps.

no reason to, since the bullets are seated deep enough not to work their way out under recoil.

-Matt
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Offline Autorim

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Re: To crimp or not?
« Reply #2 on: July 29, 2009, 03:48:41 PM »
No.
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Offline goodconcretecolor

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Re: To crimp or not?
« Reply #3 on: July 30, 2009, 05:22:45 PM »
I crimp SSTs for my 30-06. It did improve my acuracy. If youdecide to try the crimp, back off 10% on yur powder charge and work your way back up. This is very important for a high intensity round likea WSSM.
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Offline cwlongshot

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Re: To crimp or not?
« Reply #4 on: August 03, 2009, 12:04:44 AM »
My quick answer is no, it's not necessary.

 BUT, if your working up a load its would behove you to at least try crimping. Sometimes it has a positive benefit on accuracy and consistency of a given load. Doesn'T hurt to try as they say, nothing ventured, nothing gained.

CW
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Offline drdougrx

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Re: To crimp or not?
« Reply #5 on: August 03, 2009, 05:24:43 AM »
I say it depends....I crimped a couple batches of .223 for both me Rem700 LVSF and my Bushy match rifle.  I found it helps and I shoot s tighter group.  I also crimp for my 375HH.  No crimp for 45/70,06,270, 7x57 and 243.

Try it and see.
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Offline jlchucker

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Re: To crimp or not?
« Reply #6 on: August 03, 2009, 06:49:43 AM »
I have Lee Factory Crimp dies for every caliber that I load for.  Admittedly, most of them are older levergun calibers, but I do load 30-06, 308, 243, and 7mm-08.  While I go thru an additional step using the LFC for the latter calibers, I guess what I do can't really be called an actual crimp.  More of a slight bump that kind of equalizes the tension around the bullet at the case mouth.  Just a little.  It seems to help in terms of slightly tighter groups.  Before LFC's came out on the market, I didn't bother to crimp for the boltgun calibers at all, and most loads still shot pretty well.
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