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#6330639 - 06/10/16 05:07 PM 5.56 reload ?
colt45 Offline
THF Trophy Hunter

Registered: 08/19/06
Posts: 5387
Loc: bastrop county
never reloaded the 5.56, reading Patrick Sweeney, "it is usually necessary to crimp the bullet in place when loading for a semi auto", using a tapered crimp... is it necessary?
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#6330690 - 06/10/16 06:10 PM Re: 5.56 reload ? [Re: colt45]
Big Stan Online   content
Bird Dog

Registered: 05/02/14
Posts: 272
As far as I know, semi automatic rifles use a crimp unlike bolt guns. But for some reloaders who use more than enough neck tension of over .002 don't crimp at all for semi auto rifles. But its best to crimp bullets without the cannelure and lightly crimp the bullets with the cannelure so the bullet won't move in the case for semi auto rifles.


Edited by Big Stan (06/10/16 06:30 PM)

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#6330713 - 06/10/16 06:33 PM Re: 5.56 reload ? [Re: colt45]
Blackout Bill Online   content
Outdoorsman

Registered: 03/05/15
Posts: 52
Loc: Flower Mound
What Stan said. Smarter folks than me will eventually chime in but that works for me.

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#6331057 - 06/11/16 08:04 AM Re: 5.56 reload ? [Re: colt45]
jdk1985 Offline
THF Celebrity

Registered: 08/15/11
Posts: 11704
Loc: Waco, TX
Neck tension can be sufficient. I still crimp mine just for peace of mind and it does not take me any more time.


Edited by jdk1985 (06/11/16 08:05 AM)

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#6331271 - 06/11/16 12:09 PM Re: 5.56 reload ? [Re: colt45]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 6217
Loc: Wise Co.
Anyone ever done an experiment to see if bullets are pushed deeper into the neck during chambering? If so, what were the results?
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Originally Posted By: Cleric
God I am hating caliber threads more and more

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#6331277 - 06/11/16 12:22 PM Re: 5.56 reload ? [Re: colt45]
ChadTRG42 Online   happy
THF Trophy Hunter

Registered: 09/16/09
Posts: 9412
Loc: Lewisville, TX
Some of my 223 ammo I will not crimp. It just depends on the powder I'm using and how compressed the load is. The main worry on 223 ammo is the bullet moving deeper in the case during chambering in an AR rifle. This WILL increase your pressures, and could cause a problem. If you are running a compressed load with proper neck tension, the powder alone will keep the bullet from going deeper in the case. So no crimp is needed.

Also, adding a roll crimp or taper crimp can vary your neck tension on brass that has different case neck lengths (like when using mixed head stamp brass, or brass fired multiple times vs. other brass not fired multiple times). This will cause the rounds to not be the same effecting accuracy.

When I do crimp, I use a Lee crimping die, since it squeezes the neck, and does not matter on case neck lengths.
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#6331281 - 06/11/16 12:23 PM Re: 5.56 reload ? [Re: RiverRider]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
Friend of mine has a DPMS chambered in .260 Rem. Without a crimp, the first round chambered, the bullet would lurch forward. Exactly the opposite of what we expected. He applies a light taper crimp now.
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#6331286 - 06/11/16 12:26 PM Re: 5.56 reload ? [Re: FiremanJG]
ChadTRG42 Online   happy
THF Trophy Hunter

Registered: 09/16/09
Posts: 9412
Loc: Lewisville, TX
Originally Posted By: FiremanJG
Friend of mine has a DPMS chambered in .260 Rem. Without a crimp, the first round chambered, the bullet would lurch forward. Exactly the opposite of what we expected. He applies a light taper crimp now.


That's the other worry, is the bullet moving forward at the sudden stop during chambering. If a round has adequate neck tension, it shouldn't move forward during chambering. But to give more tension, crimping is the answer.
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#6331302 - 06/11/16 12:39 PM Re: 5.56 reload ? [Re: ChadTRG42]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
Yes, as hard as ARs chamber, and the sudden stop, is what we figured.

One more reason I like my bolt actions better. ARs are a necessary tool for the tool box, and I have two. But I look at them like they're female rifles. They can be high maintenance.
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#6331309 - 06/11/16 12:43 PM Re: 5.56 reload ? [Re: FiremanJG]
Big Fitz Offline
Veteran Tracker

Registered: 12/06/09
Posts: 2008
Loc: McKinney, TX
Originally Posted By: FiremanJG
But I look at them like they're female rifles. They can be high maintenance.


lizard I like females! rofl
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Originally Posted By: syncerus
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#6331463 - 06/11/16 04:23 PM Re: 5.56 reload ? [Re: Big Fitz]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
Originally Posted By: Big Fitz
Originally Posted By: FiremanJG
But I look at them like they're female rifles. They can be high maintenance.


lizard I like females! rofl


Evidently I do too. Wife, two daughters, both dogs are female, one outside cat that's female. hammer
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#6331523 - 06/11/16 05:27 PM Re: 5.56 reload ? [Re: ChadTRG42]
colt45 Offline
THF Trophy Hunter

Registered: 08/19/06
Posts: 5387
Loc: bastrop county
Originally Posted By: ChadTRG42
Some of my 223 ammo I will not crimp. It just depends on the powder I'm using and how compressed the load is. The main worry on 223 ammo is the bullet moving deeper in the case during chambering in an AR rifle. This WILL increase your pressures, and could cause a problem. If you are running a compressed load with proper neck tension, the powder alone will keep the bullet from going deeper in the case. So no crimp is needed.

Also, adding a roll crimp or taper crimp can vary your neck tension on brass that has different case neck lengths (like when using mixed head stamp brass, or brass fired multiple times vs. other brass not fired multiple times). This will cause the rounds to not be the same effecting accuracy.

When I do crimp, I use a Lee crimping die, since it squeezes the neck, and does not matter on case neck lengths.
thanks
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#6331820 - 06/11/16 10:19 PM Re: 5.56 reload ? [Re: FiremanJG]
Big Stan Online   content
Bird Dog

Registered: 05/02/14
Posts: 272
Originally Posted By: FiremanJG
Originally Posted By: Big Fitz
Originally Posted By: FiremanJG
But I look at them like they're female rifles. They can be high maintenance.


lizard I like females! rofl


Evidently I do too. Wife, two daughters, both dogs are female, one outside cat that's female. hammer


Exactly what I have at home except the kitty.

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#6332420 - 06/12/16 02:22 PM Re: 5.56 reload ? [Re: Big Stan]
wrknonit Offline
Bird Dog

Registered: 06/23/11
Posts: 321
Loc: Ingram, Texas
I always crimp on any type of service rifle or civilian semi auto; just in case. I love the Lee factory crimp dies for this.

As far as females; Wife, daughter mother, mother-in-law, grandmother-in law, sister, niece. I am drowning in the Estrogen Ocean.
texas
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#6333033 - 06/12/16 10:01 PM Re: 5.56 reload ? [Re: colt45]
Tactical Cowboy Online   content
Veteran Tracker

Registered: 08/23/11
Posts: 2844
Loc: Abilene
I crimp everything.
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