How important is case weight? And?

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Brianma65

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How important is it,to have the cases weigh the same. Do they have to be exactly the same weight or is there some tolerance? And does it matter what brand as long as they're the same weight? Thanks for any help.

Do you only find this issue with cheaper brass? Would prvi/Norman/Lapua/Nosler brass weigh the same?
 
I have sorted my 223 cases by weight in 5g groups the ones that are between (-2 & +2) either side are kept together and loaded, but for the distances I shoot I don't think it matters
 
silverfoxdj said:
I have sorted my 223 cases by weight in 5g groups the ones that are between (-2 & +2) either side are kept together and loaded, but for the distances I shoot I don't think it matters
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So if two cases are of different weights but have the same powder,bullit and primer , will they have a different POI?
 
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I always buy same brand and same lot to limit the variations
I prefer lapua when available (For my fclass and long range rifles)

but always depend of your shooting style competition, hunting , plinking or long range
 
Brianma65 said:
Target shooting and hunting. I would just like to get the most out of my rifle .
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If you are talking about 308/270, or larger calibres, you can just forget about normal differences in case weight. I proved to myself, with a 243, that weight differences of 10 grains made absolutely no difference to accuracy, or velocity.
Many people here on CGN are trying to create a problem where none exists.
Just load up your empty brass, go out and shoot them and have fun.
 
I just weighed a dozen 7MM cases. Most were 15.5 and the others were 15.2 / 15.3 I can't see how that would make a difference if everything else is equal. I think I'll take your advice (h4831) and not get to distraught over it:) But I gotta ask, what happens to the other 1%?


I'm guessing this has to do with the pressure?
 
H4831 said:
If you are talking about 308/270, or larger calibres, you can just forget about normal differences in case weight. I proved to myself, with a 243, that weight differences of 10 grains made absolutely no difference to accuracy, or velocity.
Many people here on CGN are trying to create a problem where none exists.
Just load up your empty brass, go out and shoot them and have fun.
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Bingo!!!
 
Brianma65 said:
How important is it,to have the cases weigh the same. Do they have to be exactly the same weight or is there some tolerance? And does it matter what brand as long as they're the same weight? Thanks for any help.

Do you only find this issue with cheaper brass? Would prvi/Norman/Lapua/Nosler brass weigh the same?
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As a rule, keep brand and manf lot of any brass separate.

The point of weighing cases is an indicator of the case volume. There are a number of really bad assumptions that started years ago that is now considered "fact".

Weight is NOT a good indicator of case volume. There is a good post on accurateshooter.com right now where someone has proven this to a very precise level.

If you want cases from the same manf with the same case volume, measure the volume directly. Odds are if coming from the same manf lot, the differences is pretty much nil... at least, I haven't seen anything worth worrying about in many many tested cases from many brands.

So, if you are truly worried, compare case volume with fire formed cases and a spent primer... that is the only way to know for sure.

THEN you can take any varying case and compare to sorted cases to see if the volume had any affect on target.

Not where I spend my time .....

Jerry
 
Brianma65 said:
I just weighed a dozen 7MM cases. Most were 15.5 and the others were 15.2 / 15.3 I can't see how that would make a difference if everything else is equal. I think I'll take your advice (h4831) and not get to distraught over it:) But I gotta ask, what happens to the other 1%?


I'm guessing this has to do with the pressure?
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Here is the question I was asking,

"So if two cases are of different weights but have the same powder, bullet and primer , they will have a different POI?"

I meant in 99% of those cases you would see no difference in POI, but maybe in 1% of the time you would notice a difference in POI.
 
I doubt it will make any difference at all, I don't weigh my brass, but it all gets the same powder charge and bullet. Ive never noticed a difference.
 
H4831 said:
Here is the question I was asking,

"So if two cases are of different weights but have the same powder, bullet and primer , they will have a different POI?"

I meant in 99% of those cases you would see no difference in POI, but maybe in 1% of the time you would notice a difference in POI.
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That's what I understood as well
 
I weight sort after they're loaded, for the same reason I weight sort bullets, I hear its called OCD.
A good .02grn scale helps.
 
H4831 said:
Here is the question I was asking,

"So if two cases are of different weights but have the same powder, bullet and primer , they will have a different POI?"

I meant in 99% of those cases you would see no difference in POI, but maybe in 1% of the time you would notice a difference in POI.
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Yes I understood that. I may have worded that sentence wrong. It should have been , will they have a diff POI? I don't think I'm good enough to notice 1%.
 
Brianma65 said:
Yes I understood that. I may have worded that sentence wrong. It should have been , will they have a diff POI? I don't think I'm good enough to notice 1%.
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They shouldn't, and Bruce touched on it..... Unless you are a long range addict, seeking each and every millimetre at 600 plus, there is zero practical difference......

I am a novice reloader, and a "pretty decent" shooter, and I couldn't tell the difference.....
 
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