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Joined: Dec 2014
Posts: 32
Campfire Greenhorn
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Campfire Greenhorn
Joined: Dec 2014
Posts: 32 |
After reading Mule Deer's book "The First Five Years" he says that some of the factors that mattered the most at 100 yards were:
1) Internal bullet balance
2) Concentricity w. Case Body
3) Uniform neck thickness
4)Weigh/Sort brass
My question specifically is to #4 on this post.
I'm weighing some new Nosler 7-08 Brass (first time I've attempted to sort brass this way).
All the new cases have a neck thickness of .002-.003 (90% are .002).
Weighing the first few they come in at 169 grains. So when weighing and separating according to the above criteria in #4....
WHAT SORTING PILES DO I PUT THEM INTO ACCORDING TO WEIGHT?
Is the normal variance 10%? 5%? 2grams, 2 grains??
Just trying to learn at this point, loading for a single shot Luxus (NOT a target gun) but I want to learn, and I just got the Forster case measurer tool that measures run out and neck thickness.
Thanks!
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Joined: Nov 2011
Posts: 30,908
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2011
Posts: 30,908 |
Unless you are buying seconds, Nosler brass is already weight sorted.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
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Joined: Aug 2010
Posts: 47,962
Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 47,962 |
After reading Mule Deer's book "The First Five Years" he says that some of the factors that mattered the most at 100 yards were:
1) Internal bullet balance
2) Concentricity w. Case Body
3) Uniform neck thickness
4)Weigh/Sort brass
My question specifically is to #4 on this post.
I'm weighing some new Nosler 7-08 Brass (first time I've attempted to sort brass this way).
All the new cases have a neck thickness of .002-.003 (90% are .002).
Weighing the first few they come in at 169 grains. So when weighing and separating according to the above criteria in #4....
WHAT SORTING PILES DO I PUT THEM INTO ACCORDING TO WEIGHT?
Is the normal variance 10%? 5%? 2grams, 2 grains??
Just trying to learn at this point, loading for a single shot Luxus (NOT a target gun) but I want to learn, and I just got the Forster case measurer tool that measures run out and neck thickness.
Thanks! Welcome to the fire. Are you unemployed? Or just really bored???
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Jun 2004
Posts: 44,805
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,805 |
After reading Mule Deer's book "The First Five Years" he says that some of the factors that mattered the most at 100 yards were:
1) Internal bullet balance
2) Concentricity w. Case Body
3) Uniform neck thickness
4)Weigh/Sort brass
My question specifically is to #4 on this post.
I'm weighing some new Nosler 7-08 Brass (first time I've attempted to sort brass this way).
All the new cases have a neck thickness of .002-.003 (90% are .002).
Weighing the first few they come in at 169 grains. So when weighing and separating according to the above criteria in #4....
WHAT SORTING PILES DO I PUT THEM INTO ACCORDING TO WEIGHT?
Is the normal variance 10%? 5%? 2grams, 2 grains??
Just trying to learn at this point, loading for a single shot Luxus (NOT a target gun) but I want to learn, and I just got the Forster case measurer tool that measures run out and neck thickness.
Thanks! I'm a bit concerned about this. If that many of your cases have neck thickness variation in excess of .001" then that's a crap lot.
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Joined: May 2014
Posts: 1,122
Campfire Regular
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Campfire Regular
Joined: May 2014
Posts: 1,122 |
I'm a bit concerned about this. If that many of your cases have neck thickness variation in excess of .001" then that's a crap lot.
Welcome to the fire. I'd have to agree with Mathman. With that much variation there is no way you will see under 6" 1000 yd groups.  Shod
The 6.5 Swede, Before Gay Was Ok
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Joined: Jun 2004
Posts: 44,805
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,805 |
Smartass! 
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Joined: Dec 2004
Posts: 5,111
Campfire Tracker
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Campfire Tracker
Joined: Dec 2004
Posts: 5,111 |
Do we have a problem with the decimal places?
Brass at .002/.003" is paper thin.
Thinking the dimension is more like .020/.030" or somewhere in between.
Don't think I have ever seen neck thickness less than .014" out of the box.
Heck 22 rim fire brass is .010 or more.
In a hunting gun, a thickness range or .002" would be acceptable at my house. But then I gave up being anal about it a while back.
A weight range of 2-3 grains is also acceptable in my lot assignments of brass. That usually leaves a few outside both ends of the weight range 90% fall into and those become separate lots.
I leave bullet balance to the mfrs and never messed with concentricity.
But then I gave being anal about it a while back.
To each his own, it's our right.
Tim
"The significant problems we face cannot be solved at the same level of thinking we were at when we created them."
Albert Einstein
At Khe Sanh a sign read "For those who fight for it, life has a flavor the protected never knew".
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Joined: Jun 2004
Posts: 44,805
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,805 |
Do we have a problem with the decimal places?
Brass at .002/.003" is paper thin.
Thinking the dimension is more like .020/.030" or somewhere in between.
Don't think I have ever seen neck thickness less than .014" out of the box.
Heck 22 rim fire brass is .010 or more.
In a hunting gun, a thickness range or .002" would be acceptable at my house. But then I gave up being anal about it a while back.
A weight range of 2-3 grains is also acceptable in my lot assignments of brass. That usually leaves a few outside both ends of the weight range 90% fall into and those become separate lots.
I leave bullet balance to the mfrs and never messed with concentricity.
But then I gave being anal about it a while back.
To each his own, it's our right.
Tim I did a little interpretation of the OP and figured he meant thickness variation. Not all rifles can resolve improvements, if they're even there, from all loading techniques. I have satisfied myself that getting runout of loaded cartridges below .004" is worthwhile even in sporter weight rifles when I'm after consistent results. It doesn't turn inch and a half guns into half inch guns, but it does help eliminate flyers and you might see you have a real MOA shooter. Crap brass throws a wrench into the works. Today I'll be shooting a couple of accurate 308's, one medium-heavy and one heavy. The loads are proven, and the cartridges are all straight, runout less than .002". These rifles do show on target the effects of small improvements from the loading room. Since I'll be testing a suspect scope for a friend, I figured these rifles would be the best platform.
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