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#7005016 - 12/20/17 08:42 PM Neck Sizing
DLALLDER Offline
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Registered: 11/23/05
Posts: 3312
Loc: Pittsburg, Texas
What are the most important pluses to neck sizing? Does NS actually increase accuracy? Do you NS for hunting Loads or just target shooting?


Edited by DLALLDER (12/20/17 09:10 PM)
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#7005046 - 12/20/17 08:57 PM Re: Neck Sizing [Re: DLALLDER]
Chuckw Offline
Bird Dog

Registered: 11/05/14
Posts: 259
Loc: tx panhandle
in theory, neck sizing allows the ammo to remain more concentric to YOUR chamber. this, however, relies on your chamber being concentric itself. for a hunting or match rifle i prefer to FL size and bump the shpulders back .002-.003. in a live varmint or BR gun, i prefer neck sizing with a shoulder bump. if you want to try neck sizing, the lee collet dies load great ammo and you dont have to lube. i love them.

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#7005080 - 12/20/17 09:28 PM Re: Neck Sizing [Re: Chuckw]
patriot07 Offline
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Registered: 11/06/11
Posts: 2537
Loc: Royse City, TX
Originally Posted By: Chuckw
in theory, neck sizing allows the ammo to remain more concentric to YOUR chamber.
I'd like you to explain this? If your chamber is .001" off from being perfectly concentric and the fired brass is as well, then it could now be off .002" when you put it back in your gun if the brass is rotated 180 degrees from the orientation it was fired in the first time.

On your other comments, if you don't bump the shoulder at all, can you still chamber rounds easily? Mine don't easily reload in my Tikkas if I don't bump them at least a little.

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#7005081 - 12/20/17 09:31 PM Re: Neck Sizing [Re: DLALLDER]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 26069
Loc: Wolfe City, TX
Don't ever neck size only.

Set a FL die to bump shoulders .002"-.003". It is sized the minimum to not over work the brass, it still yeilds max valocity for your powder charge, it will chamber, and it will eject after firing.

I use bushing FL dies for everything. RCBS, Redding, and Hornady. I'm not partial to one of those over the other, basically what is available. But all dies get Hornady lock rings, so there's one advantage to buying Hornady dies in the first place.
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#7005145 - 12/20/17 10:57 PM Re: Neck Sizing [Re: DLALLDER]
Growley Offline
Bird Dog

Registered: 10/26/10
Posts: 336
Loc: Aledo, TX
I use Lee collet dies to neck size only. After every other firing I use Redding body dies to bump the shoulder back. This method, along with using Redding competition seating dies has been getting me great accuracy and long brass life so far. I only load for one rifle per caliber. If that were different I would change my routine.

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#7005237 - 12/21/17 05:48 AM Re: Neck Sizing [Re: DLALLDER]
RiverRider Offline
THF Trophy Hunter

Registered: 11/11/07
Posts: 8223
Loc: Wise Co.
You CAN neck size only, at least with Lee collet dies. You do need to watch the shoulders, though. It will catch up to you after two or three firings.
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#7005461 - 12/21/17 09:21 AM Re: Neck Sizing [Re: DLALLDER]
Jgraider Offline
Pro Tracker

Registered: 06/13/15
Posts: 1136
Loc: West Texas
I neck size only with Lee collet dies. They are fantastic. I've not had to bump shoulders back yet on 7mag, 7-08, 243, 30-06. If the brass extracts easily from a chamber after firing, unless you're doing something wrong, after neck sizing only it will easily chamber again.

My runout has decreased drastically, and ammo realoaded has been more accurate. No lube necessary either.

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#7005466 - 12/21/17 09:26 AM Re: Neck Sizing [Re: DLALLDER]
RiverRider Offline
THF Trophy Hunter

Registered: 11/11/07
Posts: 8223
Loc: Wise Co.
I LOVE the no-lube aspect of the collet die!
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I'm here to give and receive knowledge, not affirmation or adoration. If you don't like it, mierda dura. Intellectual honesty is not for fragile egos.

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#7005526 - 12/21/17 10:17 AM Re: Neck Sizing [Re: DLALLDER]
cabosandinh Offline
Pro Tracker

Registered: 08/12/13
Posts: 1519
Loc: Dallas, TX
Originally Posted By: DLALLDER
What are the most important pluses to neck sizing? Does NS actually increase accuracy? Do you NS for hunting Loads or just target shooting?


your brass will last longer - as you're only sizing the part that needs work to hold a bullet

you will need run a body die after 3 firings

does not increase precision of the loaded round - that depends on a lot of other factors (brass quality, concentricity etc .... )

the Redding bushing die will allow you to set the exact bullet tension on your prepared brass (need consistent neck wall thickness)


Edited by cabosandinh (12/21/17 10:18 AM)

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#7005534 - 12/21/17 10:24 AM Re: Neck Sizing [Re: DLALLDER]
redchevy Offline
THF Celebrity

Registered: 10/25/04
Posts: 28306
Loc: Texas
Not saying it is THE way or the ONLY way or even the RIGHT way, but I neck size my 300 wby brass with a RCBS neck sizing die and run it through a FL die every 3rd firing. Never had a problem and have seen surprisingly long case life if not pushing them too hard.
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#7005788 - 12/21/17 01:35 PM Re: Neck Sizing [Re: DLALLDER]
patriot07 Offline
Veteran Tracker

Registered: 11/06/11
Posts: 2537
Loc: Royse City, TX
What is the difference between a collet die and a standard FL die that sizes with the expander ball?

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#7005838 - 12/21/17 02:07 PM Re: Neck Sizing [Re: patriot07]
postoak Offline
Veteran Tracker

Registered: 08/19/09
Posts: 2956
Loc: The Woodlands, Tx
Originally Posted By: patriot07
What is the difference between a collet die and a standard FL die that sizes with the expander ball?


The collet die presses the neck down onto a mandril. It's a radial inward force vs the expander ball of a regular sizing die which pulls the brass foward some, lengthening it.
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#7005881 - 12/21/17 02:50 PM Re: Neck Sizing [Re: patriot07]
Chuckw Offline
Bird Dog

Registered: 11/05/14
Posts: 259
Loc: tx panhandle
Originally Posted By: patriot07
Originally Posted By: Chuckw
in theory, neck sizing allows the ammo to remain more concentric to YOUR chamber.
I'd like you to explain this? If your chamber is .001" off from being perfectly concentric and the fired brass is as well, then it could now be off .002" when you put it back in your gun if the brass is rotated 180 degrees from the orientation it was fired in the first time.

On your other comments, if you don't bump the shoulder at all, can you still chamber rounds easily? Mine don't easily reload in my Tikkas if I don't bump them at least a little.


.001 is quite a bit of runout in chamber but its not unheard of. you are right though, things do continually add together to increase runout. if you will read what i originally posted, you are relying on a concentric chamber to the bore to begin with. all reamers have different dimensions and what is neck sized in a match chamber would be loose in a SAAMI chamber. thats why i said "your". perfect ammo doesnt enhance a mediocre chambering job just like a perfect chambering job doesnt enchance mediocre ammo......
all things MUST work together for top accuracy.


Edited by Chuckw (12/21/17 02:53 PM)

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#7005948 - 12/21/17 03:49 PM Re: Neck Sizing [Re: postoak]
Jgraider Offline
Pro Tracker

Registered: 06/13/15
Posts: 1136
Loc: West Texas
Originally Posted By: postoak
Originally Posted By: patriot07
What is the difference between a collet die and a standard FL die that sizes with the expander ball?


The collet die presses the neck down onto a mandril. It's a radial inward force vs the expander ball of a regular sizing die which pulls the brass forward some, lengthening it.


Which is why you should never have to bump back shoulders using the collet die. There's no expander ball.

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#7005961 - 12/21/17 03:55 PM Re: Neck Sizing [Re: Jgraider]
cabosandinh Offline
Pro Tracker

Registered: 08/12/13
Posts: 1519
Loc: Dallas, TX
Originally Posted By: Jgraider
Originally Posted By: postoak
Originally Posted By: patriot07
What is the difference between a collet die and a standard FL die that sizes with the expander ball?


The collet die presses the neck down onto a mandril. It's a radial inward force vs the expander ball of a regular sizing die which pulls the brass forward some, lengthening it.


Which is why you should never have to bump back shoulders using the collet die. There's no expander ball.


you will get a round that won't feed , eventually

then you know to run that brass through a body die

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