Yep first is fired brass and the next is resized brass. I bump my shoulder..001.
Still cant figure out my headspace.....FL sizing Die Set-up
- Thread starter MoneyWaster
- Start date
Yep first is fired brass and the next is resized brass. I bump my shoulder..001.
Perhaps a stupid question but I'll ask anyway. Please feel free to correct me where I'm wrong. I don't mind.
When we full length size a case, we are pushing the sides of the case inward thereby reducing the circumference or diameter of the case. This then pushes the shoulder of the case forward until it hits the shoulder of the die. If the die has not yet bottomed out on the shell holder, we will then push the case's shoulder downward until the die bottoms out on the shell holder. If this is indeed what is happening, are we increasing the density of the brass by forcing material into a smaller volumetric space, or is the extra brass simply being displaced upward and will present itself in a longer neck?
When we full length size a case, we are pushing the sides of the case inward thereby reducing the circumference or diameter of the case. This then pushes the shoulder of the case forward until it hits the shoulder of the die. If the die has not yet bottomed out on the shell holder, we will then push the case's shoulder downward until the die bottoms out on the shell holder. If this is indeed what is happening, are we increasing the density of the brass by forcing material into a smaller volumetric space, or is the extra brass simply being displaced upward and will present itself in a longer neck?
If material cannot be compressed then it must be displaced.
I really think you guys over thinking this whole thing. Dude we are talking about thousands of an inch. We really are not moving much material and definitely not very far. The only direction that material can go is into the neck.
Thanks Richard. You answered my question. Now I know.
Metal is going to go to the area of least resistance . And that wouldn't be into the neck . Larry
Someoldguy
MoneyWaster-
May I suggest you forget the contents of this thread in their entirety and find yourself an experienced reloader in your local area? There is quite simply too much dis-information for anyone to sort through here.
Holy sheep.
May I suggest you forget the contents of this thread in their entirety and find yourself an experienced reloader in your local area? There is quite simply too much dis-information for anyone to sort through here.
Holy sheep.
The brass is not compressable. The die, the ram and the shell holder are solid cast iron or steel. They have a higher compressive yield than does the brass. The only place the case is not contained or constrained is out the neck of the die. That is exactly where the brass goes when the case is resized. The stretched metal from the body of the case goes up the neck making the case get longer. If it exceeds your length limit then you probably trim it.
When the case is fired it will expand something like a balloon until it is constrained by the chamber. The brass stretches until it is supported by the chamber. This stretched brass is then resized and the extra length or girth of the stretched material gets forced up the neck of the die.
When the case is fired it will expand something like a balloon until it is constrained by the chamber. The brass stretches until it is supported by the chamber. This stretched brass is then resized and the extra length or girth of the stretched material gets forced up the neck of the die.
Goal, objective? The OP had a rifle built with the understanding the rifle was blue printed; the blue printer claimed the chamber was between go-gage and no go-gage length and I wonder about blue printing. It seems anyone claiming to be a blue printer would have the skills necessary to measure the length of the chamber from the shoulder to the bolt face. And now I find it common among reoaders and smiths to be lacking in skills and knowledge when it comes to measuring the length of the chamber. I had nothing to do with their problem, if I have an interest in a rifle the first thing I do is measure the length of the chamber.
I have made shop calls, again, I purchased a mill from a resource collector, builder of period correct military type rifles; he was building a Rock Island 03 correct rifle for 1911. When checking the length of the chamber he made the mistake of posting the question on a socially dysfunctional form. No one on the forum could answer his question and the thing that made things worst each of the members were desperate of attention. He wanted to know how to measure the length of the chamber, he did not want to know if the bolt would close on a go-gage. he did not want to know if the bolt would not close on a no go-gage; he wanted to know the length of the chamber in thousandths. He had no fewer than 20 head space gage of different lengths, I offered to modify one of the gages to a go to infinity gage. I offered to make 3 gages from tools he had on his bench, in his tool boxes and hanging on the wall. All he wanted to know as the length of the chamber. SO? I measured the length of his chamber from the shoulder to the bolt face. His new build was .0025" longer than a go-gage length chamber or .0075" linger than a minimum length/full length sized case or .0025" shorter than a no go-gage length chamber.
Again, finding a bolt that would off set the length of the chamber .0025" could not be found among his 100 + bolts or my 35 03 bolts. What does all of this mean? Instead of firing a case with .005" clearance his cases had .0075" clearance. For me; not a problem, I would add .004" to the length of the case between the shoulder to the case head, I could add .005" to the length of the case between the shoulder and case head, that would give me .0025" clearance.
Tools necessary to determine the length of his chamber cost about $11.00.
F. Guffey
Go Go Guffey!
As I have said before many times; I do not want anything between my case and chamber but air, I want clean air but I do not want a lot of air for obvious reasons. The case is embeddable, I do not want cross hatching, I want my chamber to be smooth, when it comes to grip there is nothing like 100% contact.
F. Guffey
Someoldguy
hogpatrol
Gold $$ Contributor
I give up. What are they and where can they be purchased or how can they be made. Inquiring minds want to know. One picture, photo, blueprint, or sketch is worth a thousand words.
hogpatrol
Gold $$ Contributor
hogpatrol
Gold $$ Contributor
Sniping? Us? Why, I'm shocked! Put a follow on one of our favorite members. You may or may not get the picture.
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