Too much crimp??
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Category: Firearms, Bows, and Ammunition
Forum Name: Reloading & Ballistics
Forum Description: Anything to do with ammunition
URL: http://www.opticstalk.com/forum_posts.asp?TID=39948
Printed Date: March/28/2024 at 13:09 Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: Too much crimp??
Posted By: cheaptrick
Subject: Too much crimp??
Date Posted: May/19/2014 at 12:55
These are .224 Sierra Match Kings that I crimped using a Lee Crimp Die and pulled thereafter. I feel I may have "over done it", which is how roll, but are the rounds unsafe to use in my AR? I realize the deformation of the bullet may decrease accuracy, but like I said, these are for my AR and I'm more concerned about bullet set back than I am about sub MOA accuracy.
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Replies:
Posted By: cheaptrick
Date Posted: May/19/2014 at 12:56
By "unsafe" I mean will there be an unsafe increase in chamber pressure.
Thank you in advance.
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Posted By: Bigdaddy0381
Date Posted: May/19/2014 at 13:14
Looks like a little to much to me, But don't crimp anything at all ever so I don't have much knowledge in the crimping area.
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Posted By: BeltFed
Date Posted: May/19/2014 at 13:18
Wow, that is a heavy crimp. Have you checked into getting a taper crimp die? Where does your load fall in your loading manual? If your close to max, then you MAY not want to run a steady diet of them through your AR.
------------- Life's concerns should be about the 120lb pack your trying to get to the top of the mountain, and not the rock in your boot.
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Posted By: cheaptrick
Date Posted: May/19/2014 at 13:44
I'll probably just hammer 'em out and start over. Oh well.....
Thank you.
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Posted By: supertool73
Date Posted: May/19/2014 at 15:20
I don't crimp anything at all either. Even in my ARs I don't. Never had an issue and I have loaded and shot well over 20,000 rounds out of my ARs.
SMKs do have very soft jackets as well, so it doesn't take much to dent them.
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Posted By: SVT_Tactical
Date Posted: May/19/2014 at 15:23
If near max I'd pull them.
I'd also check the ones you have pulled to make sure the heavy crimp didn't make any bulging in the bullet body near it with a micrometer.
------------- "Most folks are about as happy as they make their minds up to be" - Abraham Lincoln
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Posted By: cheaptrick
Date Posted: May/19/2014 at 16:59
supertool73 wrote:
I don't crimp anything at all either. Even in my ARs I don't. Never had an issue and I have loaded and shot well over 20,000 rounds out of my ARs.
SMKs do have very soft jackets as well, so it doesn't take much to dent them.
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I haven't ever crimped either, but I'm half scared of a set back round going off.
Good point about the soft jacket on the Match King. I honestly didn't think I was putting a whole lot of pressure on the press arm when I was at it, so I'm a little surprised that it has that heavy of a crimp. But, like I said earlier, rarely have I ever messed up something by a lack of effort.....
Thanks again, Fellers.
------------- If at first you don't secede...try..try again.
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Posted By: sakomato
Date Posted: May/19/2014 at 20:18
One has to wonder if that amount is sufficient to cause a problem given that the lands do a much larger amount of damage to the bullet and the amount of disfigurement perpetrated by the factory and sometimes a combination of both
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Posted By: RifleDude
Date Posted: May/19/2014 at 20:41
Though it's a bit unsightly, I highly doubt it will cause any pressure problems, especially given he has a 5.56 chamber.
------------- Ted
Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle.
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Posted By: Bigdaddy0381
Date Posted: May/20/2014 at 06:09
My main concern with crimping is the uneven pressure on the bullet. so when fired it will push the bullet into the lands off center. I know the crimp wont drive up the pressure but a bullets going into the lands/rifling would of its a tad off center. Just my thoughts on it, but I don't think much so take it for what it is.
------------- P&Z Firearms , Pro gun cleanings and gun repair and wood refinishing.
Ecclesiastes 10:2
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Posted By: Kickboxer
Date Posted: May/20/2014 at 06:46
You don't think much...
Brando, you are one of the most THOUGHTFUL people I've ever known.
------------- Opinion,untempered by fact,is ignorance.
There are some who do not fear death... for they are more afraid of not really living
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Posted By: cheaptrick
Date Posted: May/20/2014 at 13:34
I'm gonna go ahead and choot 'em. What's the worse that can happen...right??
------------- If at first you don't secede...try..try again.
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Posted By: Bigdaddy0381
Date Posted: May/20/2014 at 15:28
I would, who needs a face anyways...
------------- P&Z Firearms , Pro gun cleanings and gun repair and wood refinishing.
Ecclesiastes 10:2
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Posted By: cheaptrick
Date Posted: May/20/2014 at 16:32
Bigdaddy0381 wrote:
I would, who needs a face anyways...
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Maybe I'll let some dude at the range fire them off......
------------- If at first you don't secede...try..try again.
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Posted By: hatton mann
Date Posted: May/21/2014 at 02:25
You should see the crimp I put on 30/30 rounds.
Pull them and send them to me.
Veral Smith is a proponent of the Lee factory crmp die.
I crimp most everything,,,sometimes 'light', sometimes heavy.
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Posted By: Bigdaddy0381
Date Posted: May/21/2014 at 05:47
so my invite for"Take a friend to the range day" just hit the mail, AYE!!
------------- P&Z Firearms , Pro gun cleanings and gun repair and wood refinishing.
Ecclesiastes 10:2
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Posted By: RifleDude
Date Posted: May/21/2014 at 06:19
Haha!!!
------------- Ted
Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle.
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