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getsmart
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Posted: March 31 2018 at 1:19pm | IP Logged Quote getsmart

I typically do not crimp the necks of my rifle cartridges. I have only loaded .264 and .308 calibers in the past. Today, I am starting some 5.56/.223.

My die set came with a crimp die. Does everyone crimp 5.56mm rounds so the bullets do not move in the magazine while firing? Eric

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Paul B.
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Posted: March 31 2018 at 2:31pm | IP Logged Quote Paul B.

I guess it's what you're gonna be shooting them in. My .223 rifles are a
Ruger #1V with heavy barrel and a Kimber Super America bolt action so
I don't bother with a crimp.
I would imagine if you're shooting something like an AR15, then a crimp
might be necessary to keep a bullet from shifting in the case while going
through the slam bang of being chambered. I don't shoot an AR or
similar type firearm so not sure if a crimp might be necessary, I'm sure
other here can chime in on that subject.
Paul B.
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doghawg
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Posted: March 31 2018 at 7:45pm | IP Logged Quote doghawg

getsmart

As Paul said, I imagine it would depend what you're shooting them in. I never crimp for .223 bolt rifles . With an AR 15 Bushmaster I've lightly crimped bullets with a crimp groove but have also run a lot of bullets through it with no crimping groove and no crimp and thus far...no problems.
I'm thinking that with a cartridge case with little neck tension the bullet could possibly move. I'm not a real big fan of AR's so maybe someone who is could give a better answer on that.

Randy

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Old Ranger
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Posted: April 01 2018 at 8:28am | IP Logged Quote Old Ranger

In the Anderson Mfg AR15 I have there has never been a
need to crimp. Even my necksized rounds with the 310 do
not move or shift. Further, back in the 90's when I shot
an Armalite AR180 there was never a need to crimp a
thing.

I'm betting that you'll be just fine with case neck grip
alone to secure the projectile in place.

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getsmart
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Posted: April 01 2018 at 11:41am | IP Logged Quote getsmart

I did an ever so slight crimp on my first 20 loads. The crimp die just barely touches the mouth. But I did see a slight crimp.

Perhaps I will stop crimping after I see how these shoot in my AR and compare with no crimp. I feel that there is no need since there is very little recoil.

Thank you for the input. Eric

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Old Ranger
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Posted: April 01 2018 at 1:00pm | IP Logged Quote Old Ranger

Yes sir, the bolt is quite solid in making contact of the
rim and the entire carrier moved in absolute alignment.
The angle of case entry into the chamber is quite
shallow. This allows the efficiency of operation being so
smooth with the full auto and burst military weapons.
That design is simply a benefit to a semi-auto operation
in that there is little canting of the cartridge upon
it's travel from the magazine to the chamber. It simply
will not disrupt the bullet within the case. Handy for
reloading huh?

A mild crimp is harmless here. You're good to go and I'll
bet you're also ready for test shots too! Kesp us
posted on how it goes.

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hoghunter
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Posted: April 03 2018 at 2:54pm | IP Logged Quote hoghunter

I've loaded and shot thousands of 223's in seven to eight different bolt rifles and have never crimped a single round or found it necessary.

If you have sufficient neck tension there should be no need to crimp in a bolt rifle especially in a 223 which has light recoil.

If you're a precision shooting crimping just introduces another variable that can affect / degrade accuracy.
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getsmart
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Posted: April 03 2018 at 5:59pm | IP Logged Quote getsmart

I shot my 5.56mm today. All 20 cycled through the AR, just fine. 25.3 grains of Varget and 69gr. Matchkings.
50 yards with iron sights. Now I need to put a temporary scope on it and see how they group.


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Old Ranger
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Posted: April 03 2018 at 7:39pm | IP Logged Quote Old Ranger

Yeah!!

Well done.

A scope?
At 50yds? huh?

Nevermind. Just messin with ya..... Or am I?

Good work on your 223 loads.

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getsmart
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Posted: April 03 2018 at 7:46pm | IP Logged Quote getsmart

Ranger, I know, I know. I just have to see how they group.

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Old Ranger
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Posted: April 04 2018 at 12:58pm | IP Logged Quote Old Ranger

I know Eric. Just giving you a bit of a rib poke!
Actually I'm quite proud of your attention to extreme
details. Shows a solid and methodical approach to things.
SALUTE!

At least you didn't do a super cleaning of your little
black rifle and reassembled it with the little flip up
front sight on backwards! Now there's
something to laugh at!

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getsmart
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Posted: April 13 2018 at 12:16pm | IP Logged Quote getsmart

No Ranger, I did not do that.   But I did put loctite on the set screws of my iron sights so that now I have to mount the scope way forward to clear the rear sight.

Live and learn.

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Old Ranger
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Posted: April 14 2018 at 7:50am | IP Logged Quote Old Ranger

What's a scope?

Have fun Eric!

I gave the little 1.25x4 mil dot scope to my
granddaughter. Her husband has convinced her she "needs"
a scope. A vertical forward grip. A pressure switched LED
light. Odd looking "bumpers" on the bottom of her
magazine. Multiple railed foreend with the light on it
and also a laser device too. Noisy clipped on sling hung
onto standard 1.5" swivels. Her weapon is a rattling,
noisy, awkward thing now that weighs close to 12 pounds!
Me and my little girl are going to have a serious talk
about keeping it "light, tight, and right". Her husband
is a well meaning lad, but has no real training.
The lads into accessories. Funny part is he doesn't want
an AR15 (so he says) but he sure has taken over his
wife's rifle!

Sorry about the mini-rant on tacti-cool stuff.
Eric, I know your piece is set up well and the scope is
temporary just for load development. Just razzin' ya a
bit outta 'ole buddy kinda fun.

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