Brass soring by neck thickness

[atkins08]

I saw the new sinclair tool on the homepage that advertises to sort brass by neck thickness. I was curious how many of you that shoot competition and don't neck turn your brass, but still check your neck thickness?

 

[seymour fish]

I saw the new sinclair tool on the homepage that advertises to sort brass by neck thickness. I was curious how many of you that shoot competition and don't neck turn your brass, but still check your neck thickness?

YES

 

[Rust]

I gave up neck turning, for match rifles I check neck thickness. This is done after case prep, the case neck needs to be sized so that it is in fact round and the case mouth deburred with new cases. As an example my current batch of .308 cases run about .0145" and any with more than .0015" are not used for match shooting.

 

[JohnHenry]

On some brands of brass, if one checks the neck wall thickness at multiple points around the circumference, it is not uncommon to see .0015 variations on a single case. I am a believer in the accuracy benefits of neck turning, but would need to see some data on the benefits of sorting a single lot of brass based on a neck wall thickness measurement on a case. Does one sort based on the thinnest point, the thickest point, or the difference between the thickest and thinnest points? I do not know the spec on the Sinclair indicator, but would guess .001 based on the price($30). I would think one would want a .0001 indicator(considerably pricier) to measure neck wall thickness. Accuracy minded shooters are great for buying gadgets. One wants those that one continues to use to exceed the number that collect dust.

 

[brxbrad]

On some brands of brass, if one checks the neck wall thickness at multiple points around the circumference, it is not uncommon to see .0015 variations on a single case. I am a believer in the accuracy benefits of neck turning, but would need to see some data on the benefits of sorting a single lot of brass based on a neck wall thickness measurement on a case. Does one sort based on the thinnest point, the thickest point, or the difference between the thickest and thinnest points? I do not know the spec on the Sinclair indicator, but would guess .001 based on the price($30). I would think one would want a .0001 indicator(considerably pricier) to measure neck wall thickness. Accuracy minded shooters are great for buying gadgets. One wants those that one continues to use to exceed the number that collect dust.

I too am an advocate of neck turning. I wonder how many pieces of brass one would have to buy to get 75 rounds within +/- .001 - .002 of each other. I'm thinking that if you are going to go through all that, why not go ahead and make them all the same to begin with? I've found it necessary to re-turn my necks after 5 or so firings to keep them uniform.
Must be the OCD ha
2 cents....

 

[USMCDOC]

It don't take much to clean those necks up a tad.. what maybe a 1K..

 

[noload]

I turn a lot of necks, and I think by the chip curl coming off.. that the necks are pretty uniform before they are turned. That said, (if I did not turn) I would not check neck thickness, I would size the neck and make the ID's uniform with an Expander Mandrel.

 

[dcali]

Even good brass (Lapua, Norma, etc) will have cases where one side of the neck is .001" larger than the other. That's an extreme case, but you can expect to find a couple of those in every box of 100. So I'm not really sure how you'd sort by thickness in the first place. And if you're going to go to all that trouble, why not just turn them and not have to keep them sorted? It takes longer to measure 100 cases properly than it does to turn them. The Sinclair tool looks too crude to really do much good. I can't imagine shooting brass that bad to begin with.

 

[memilanuk]

I knew a fellow who *loved* Winchester .308 brass. He had a fairly elaborate sorting procedure, where he'd first sort by weight, and cull the outliers. Then he'd check the neck thickness with a Neco gauge at four cardinal points, and enter the readings into a spreadsheet, with conditional formatting set up to red flag any variance above a certain level. Then he'd set up with the long anvil for checking inside case web thickness, and take readings at four cardinal points again and cull some more.

Me, I just bought Lapua and skimmed the neck. He thought neck turning was *way* too much work. Me, I figured by the time he finished sorting/culling his way, that his Winchester wasn't any cheaper than my Lapua, and took *way* longer to process. I think he just enjoyed the data collection part a little too much

They both shot some pretty good scores, though