I read this article http://www.accurateshooter.com/technical-articles/reloading/neck-tension-not-just-bushing-size/ And learned a great deal. However I’d like to know what a good starting point would be for neck tension for both semi-autos and bolt actions..
Neck tension starting point
- Thread starter Kramerica
- Start date
I don't think you should the same tension in both. .002 for bolt and .004+ for Semi-Auto to start.
300 WSM like .004
in what application ?
if you are using it a load tuning, you would also have to describe your gun and your load.
else 1 works fine.
if you are using it a load tuning, you would also have to describe your gun and your load.
else 1 works fine.
For my comp guns, which means NO cartridges in the mag, I run .001”-.0015” in most barrels, but have 1 that likes .004”.
In my precision hunting rifles, I run .002”-.003”.
My 222 likes .003”.
Haven’t run a semi since they were banned here in ‘96, but my BAR’s ran .002” without issue.
Cheers.
In my precision hunting rifles, I run .002”-.003”.
My 222 likes .003”.
Haven’t run a semi since they were banned here in ‘96, but my BAR’s ran .002” without issue.
Cheers.
LA50SHOOTER
Sworn To Protect The Constitution.
Based on what Bart ? - Show some definitive real world test results because that simply has not been reality in my own tests.
dmoran
Donovan Moran
@Jalen
What caliber and bullet weight are you asking for?
For what use/purpose?
What neck length and how much of the bullet shank will be seated into the neck?
How much of the neck will be sized?
Neck turned brass or not?
How thick of neck walls?
IME - these things can have a lot to do with how much tension maybe needed/optimal.
For an in general answer and/or purpose, 0.002" is my advise.
What caliber and bullet weight are you asking for?
For what use/purpose?
What neck length and how much of the bullet shank will be seated into the neck?
How much of the neck will be sized?
Neck turned brass or not?
How thick of neck walls?
IME - these things can have a lot to do with how much tension maybe needed/optimal.
For an in general answer and/or purpose, 0.002" is my advise.
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Extraction force required to pull bullets out of the case necks. The less there is, the smaller the spread will be. That produces best accuracy in my experience. And that of others.
Military team members oft times used a Lyman 310 tool with a seating die to seat arsenal match ammo bullets a few thousandths deeper breaking the black asphaltum seal between bullet and case neck. Elevation stringing at all ranges was reduced about half. Bullet extraction force went from around 30+ pounds to under 10 pounds.
Measure your ammo's bullet extraction forces. It's another variable.
LA50SHOOTER
Sworn To Protect The Constitution.
My experience with neck tension is:
Firstly I’m using as good of brass as I can find and I try to purchase enough to get me through the life of the barrel(s) being run. And I like to have the brass all come from the same lot number if possible.
I neck turn to just clean up at 100% and I try to run at .003 to .004 (total) under the chamber neck size for a loaded round.
- When I start my load development I start with .002 for a 22 and 6mm caliber. For a 7mm to 338 caliber I start off at .003. I’ve used as much as .004 in the 300 WSM and it has yielded very good results.
- In a 375, 416 & 50 calibers I normally start at .003 but have seen as much as .005 work well.
Also, I’m not usually neck sizing the entire length of the neck. Usually 75 to 50% of the neck is how much I size, and I anneal to maintain consistency.
That’s my 2 cents -
- Ron -
Firstly I’m using as good of brass as I can find and I try to purchase enough to get me through the life of the barrel(s) being run. And I like to have the brass all come from the same lot number if possible.
I neck turn to just clean up at 100% and I try to run at .003 to .004 (total) under the chamber neck size for a loaded round.
- When I start my load development I start with .002 for a 22 and 6mm caliber. For a 7mm to 338 caliber I start off at .003. I’ve used as much as .004 in the 300 WSM and it has yielded very good results.
- In a 375, 416 & 50 calibers I normally start at .003 but have seen as much as .005 work well.
Also, I’m not usually neck sizing the entire length of the neck. Usually 75 to 50% of the neck is how much I size, and I anneal to maintain consistency.
That’s my 2 cents -
- Ron -
LA50SHOOTER
Sworn To Protect The Constitution.
Bullshit - I simply don’t believe that “The less extraction force the smaller the spread will be”
During my 15 years on active duty in the U.S. Navy I shot with the Pacific Fleet rifle and pistol team. We never used a Lyman 310 tong tool.
I said "oft times" which means "some times," not "all the time." It was illegal to do that to ammo used in leg matches as they required unaltered ammo be used.
I also shot on USN teams and "oft times" borrowed that tong tool from other service's team members. Or loaned mine to them, after I got one.
LA50SHOOTER
Sworn To Protect The Constitution.
I believe the MORE consistent the extraction force is then this can most probably be equated to greater accuracy.
And neck tension is no easier to control being light as compared to being relatively greater from a pull force measurement standpoint.
And neck tension is no easier to control being light as compared to being relatively greater from a pull force measurement standpoint.
LA50SHOOTER
Sworn To Protect The Constitution.
BART,
I’m not going to continue an excercise in futility here with you.
I challenge you to run a Well documented test - Then I’d be willing to further discuss this topic.
I’m not going to continue an excercise in futility here with you.
I challenge you to run a Well documented test - Then I’d be willing to further discuss this topic.
I agree a more consistent extraction force is best for accuracy. A 30% spread with a 60 pound minimum is typically bigger and less consistent than a 30% spread with a 20 pound minimum. Arsenals proved that decades ago. Check their specs. My own tests across bullet pull force confirmed all that.
And Donovan Moran continues his support, approval and appreciation of anyone who disagrees with me.
And Donovan Moran continues his support, approval and appreciation of anyone who disagrees with me.
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LA50SHOOTER
Sworn To Protect The Constitution.
Bart,
This will be my last post on this thread as I'm not going to continue to argue.
Firstly, Donovan Moran is NOT the focal point here. "Neck tension starting point" Is.
IF in fact minimum neck tension was the best as your determined to state, then Why haven't all those top winning shooters in all the competitive shooting disciplines reviled this to us ??
Done !!!
This will be my last post on this thread as I'm not going to continue to argue.
Firstly, Donovan Moran is NOT the focal point here. "Neck tension starting point" Is.
IF in fact minimum neck tension was the best as your determined to state, then Why haven't all those top winning shooters in all the competitive shooting disciplines reviled this to us ??
Done !!!
You need to ask them, not me. Some of them agree with me. I don't speak for them.
I've agreed with you that uniform is best, if friction is the real issue.
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