Neck sizing for accuracy
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Mikecr
Well-Known Member
No sizing plan in itself improves or hurts accuracy, as it's just too abstract to declare otherwise in a broad sense.
Your sizing plan will be more about reloading than accuracy.
With a well designed cartridge, and a plan backed with understanding, minimal sizing can increase brass life(all the way to indefinite). With a poorly designed cartridge, and no plan and/or no understanding, minimal sizing can make you suffer your sins.
You can't get away with NS only in just any old system & situation.
Your sizing plan will be more about reloading than accuracy.
With a well designed cartridge, and a plan backed with understanding, minimal sizing can increase brass life(all the way to indefinite). With a poorly designed cartridge, and no plan and/or no understanding, minimal sizing can make you suffer your sins.
You can't get away with NS only in just any old system & situation.
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In theory, yes but it's becoming an antiquated process and not really necessary. I neck sized only for several years for a couple of my higher end rifles and they shot well but you do pay somewhat of a price with regard to how smooth your action is in the field and potentially your feeding reliability. I recall reading somewhere that neck sizing only can also be hard on the bolt face and the bolt lug mortises but not sure about that.
Bottom line: I'd go with FL sizing.
Calvin45
Well-Known Member
I don't mess around with neck sizing much anymore. I probably don't shoot well enough to realize any benefits from it but I have experienced it's downside, resistance when chambering a round in the field while hunting. Anything i plan on using to hunt with is full sized.
I always heard and was always told growing up that neck sizing was more accurate. I honestly have shot more sub 1/2 MOA groups with full sized brass than neck sized brass. I don't think it really improves anything. I think it's a hassle to have to full length size after a few shots on neck sized brass then repeat the process. I just full length size everything now and don't worry about tight bolt closure on a loaded round or any of the neck sizing issues.
Also to add, if your chamber has any sort of runout or is crooked in anyway. Your neck sized only brass will only fit your chamber perfect if you index it in the exact same spot the neck time you chamber that piece of brass.
Also to add, if your chamber has any sort of runout or is crooked in anyway. Your neck sized only brass will only fit your chamber perfect if you index it in the exact same spot the neck time you chamber that piece of brass.
Riflehunter1776
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some rifles shoot better when NSed. Some shoot better bumped or FL sized. it depends on the rifle.
aushunter1
Well-Known Member
Imo neck sizing is more about preserving your brass by reducing case hardening & not working the whole case.
In saying that you still need to anneal.
The amount of 'runout' produced in any sizing process using comes down to the quality of the dies.
A lot(probably most) BR shooters remove the expander from even their top quality dies & use a specific sized mandrel to give a specific amount of neck tension but also to improve concentricity.
I would also say neck turning would also assist in this, which is why they(BR shooters) do both processes.
Using the mandrel in place of the dies rod improves alignment.
Still, you really need to get yourself a concentricity gauge to measure all this otherwise there is no point.
In saying that you still need to anneal.
The amount of 'runout' produced in any sizing process using comes down to the quality of the dies.
A lot(probably most) BR shooters remove the expander from even their top quality dies & use a specific sized mandrel to give a specific amount of neck tension but also to improve concentricity.
I would also say neck turning would also assist in this, which is why they(BR shooters) do both processes.
Using the mandrel in place of the dies rod improves alignment.
Still, you really need to get yourself a concentricity gauge to measure all this otherwise there is no point.
Calvin45
Well-Known Member
Agreed about the concentricity gauge, and in fact that particular tool is high on my "I want one of those" list.
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Riflehunter1776
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ugh. here we go with that video of him waving his arms around and talking to people like they are idiots.
I have some rifles that prefer Neck sizing and will flat outshoot the same load which was "bumped". I have some rifles which shoot better bumped. There is no universal answer which fits every single rifle without fail. find out what works best for you by trying it.
I have some rifles that prefer Neck sizing and will flat outshoot the same load which was "bumped". I have some rifles which shoot better bumped. There is no universal answer which fits every single rifle without fail. find out what works best for you by trying it.
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Very interesting take on the situation from someone who should know. Thanks for sharing that!Click on image to enlarge
Mikecr
Well-Known Member
Calls to authority, without accompanying basis, amount to no more than folklore..
It only serves to compound abstracts already difficult to consider.
As far as I'm aware of, there is no proof regarding performance one way over another.
What I am sure of though, is that your degree of success or failure in it comes down to understanding and planning.
It only serves to compound abstracts already difficult to consider.
As far as I'm aware of, there is no proof regarding performance one way over another.
What I am sure of though, is that your degree of success or failure in it comes down to understanding and planning.
