case weight

[Dusty Stevens]

Ron,
'how to accurately measure H20 capacity' should be another thread, or thread search: http://forum.accurateshooter.com/se...o+accurately+measure+H20+capacity&o=relevance
How could sorting by weight be worse than not sorting at all? Because of the sorting part, which is acting on weak basis. If you need to separate and use best capacity match of 50 cases, you don't really get there, that you know of, using shortcuts and assumptions. You get there through planning, preps, direct measurements, and understanding.
So you might cull 5 cases deviating in weight, while leaving 3 cases in the remaining 45 that still deviate in capacity. You lost 2 extra cases gaining nothing over doing nothing.
On the other hand, if you simply cull the 3 deviating by capacity, you'd be down to 47 cases -while meeting your objective.
While you don't understand the actual deviation was not towards you personally. This could be WE, or I. And the context of this is that there is no real gain without understanding.
If we ask someone what to do and follow a direction given, regardless of apparent result, we gain nothing real until understanding it. If we try something and it seems to work, it hasn't really until we understand what is working. That is, we've isolated/tested something in particular to understand, and drawn a conclusion on this valid attribute.

Otherwise we're left with generalizations, rules of thumb, loose notions, common fallacies, and hearsay. Much, of little actual value.

So youre saying those 3 or whatever that vary in capacity still weigh the same? Where is the capacity difference? If its got less capacity that means the inside is different right? Which means the weight would vary and ron would have caught that in his weighing. This only applies to quality brass from the same box of course

 

[rammac]

Brass is a combination of copper and zinc, thus your statement “some brass alloy Mixed with Zinc” is both redundant and sloppy. Your initial assertion is correct and does not require citing any “study” to prove it. One can easily satisfy himself of that in a few minutes. Your notion of what you are doing when evaluating case volume and “the effect on hot gasses” is difficult to grasp. Can you expand on this ?

Why respond, it's obvious that you just want an argument.

 

[Mulligan]

For what it is worth, the above chart is of a batch of 20 284 cases that all have 67.4 gr. water weight. As you can see the empty case weights are a bit of a mess. I separate all my match brass into batches of 20 for f-class.
I have not been able to see any correlation between case weight and case volume.
Maybe its just me.

If you don't like messing with water, ball powder will also work. It is a bit fickle, however once you develop a pour technique its fairly easy.

CW