Brass

[Hippy]

Should NEW Brass B weighted B 4 or after neck turning

Thanx


Jim

 

[GLShooter]

After IMHO.

 

[Bill Norris]

After. Whether you ae turning just to clean up the thickness or turning for a tight neck chamber the weight will change accordingly.

 

[fkimble@charter.net]

Out of the box and onto the scale simply tells you how good the brass disk were made. Your gonna shoot the finished product case, which does not include the removed brass. Say two new out of box cases weight the exact same thing. One has a thick neck, other a thin neck. So you will be making necks equal, by removing different amounts of brass, making the case weights different.

Frank

 

[quest450]

If you trying to sort brass by weight it may not necessarily correlate to internal case capacity
But a lot of shooters do it because it's quick and easy, I'd sort by internal case capacity to eliminate the high/low outlayers but that's another rabbit hole.

 

[old_heli_logger]

I just pick the middle of my node

 

[Webster]

Out of the box and onto the scale simply tells you how good the brass disk were made. Your gonna shoot the finished product case, which does not include the removed brass. Say two new out of box cases weight the exact same thing. One has a thick neck, other a thin neck. So you will be making necks equal, by removing different amounts of brass, making the case weights different.

Frank

Some of the top shooters don't weigh or determine volume wth Lapua brass. You don't know if the case weight variation is in the case head or body.

 

[Bill Norris]

Some of the top shooters don't weigh or determine volume wth Lapua brass. You don't know if the case weight variation is in the case head or body.

AGREE ^^^^^^^

 

[Doug Casner]

Worked several years in the 7.62 case area at lake city. Never could figure out weighing brass cases. So many factors not influenced by the weight of the case. I guess it might catch a few things really out of whack but their inspection oughta catch that stuff. Doug

 

[Rat Rifle]

How about…
sort by water volume
better, sort by velocity
better yet, sort by Point of Impact

 

[jds holler]

If ya look at a case cut-out diagram or even the real thing, you can see that probably 1/2 of the case weight is contained in about the bottom third of the case. And about half of that portion is hardly effected by the sizing process.

I'm starting to think that the only logical way of comparing cases is to do it by water volume, and then only after being fired in my chamber and then trimmed to equal length and primer pockets conditioned.

AND -- I would only do that if I was a REAL shooter like some of y'all. And no, I'm not trying to be sarcastic. jd

 

[TonyinKY]

300 pcs Lapua 6BR brass weight sorted for my 30BR. I culled 30 pcs. = 10%. I always waste a few setting my neck turner. After these were neck turned, fire formed twice and trimmed to length I weighed about 30 pcs and all were <0.5 gr. Most varied .1-.2 grains.

 

[jds holler]

300 pcs Lapua 6BR brass weight sorted for my 30BR. I culled 30 pcs. = 10%. I always waste a few setting my neck turner. After these were neck turned, fire formed twice and trimmed to length I weighed about 30 pcs and all were <0.5 gr. Most varied .1-.2 grains.

Would also be interesting to see if the cases which had equal weight after processing, also had equal H2O weight. jd

 

[TonyinKY]

A lot of great shooters don’t cull any brass. I culled my 10% and never touched them again except for using a few to set my neck trimmer. My method gives me confidence and piece of mind for short range Benchrest. If I shot long range I’d probably think about checking case capacity.

Okay I stand corrected. Your processed cases turned out more uniform in weight, than I would have expected.

The, "After these were sorted . . . " statement is a little confusing. I could be having a "numb spell" [as we like to say up here in Maine ], but did you did process and include the 30 culls, minus any that got roached, with the other 70?

The test to see if the original difference(s) in weight mattered, would be to keep the three batches separated, run them thru the same process, and then using your best load, test fire them against each other.

Just a suggestion.

SJ

 

[Webster]

Would also be interesting to see if the cases which had equal weight after processing, also had equal H2O weight. jd

A while back someone posted extensive data where they plotted case weight VS case volume. It was a scatter chart. Someone else posted data that seemed to show correlation??? If you are not shooting serious competition don't worry about it. Just go by the load that makes the smallest group and have fun shooting or hunting. Do a search and you can find the data and graphs.

Charts on wt. VS volume on this website. Do a search for scatter chart to find the original complete article.
Looks to me like it's not meaningful.