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Rifles, Reloading, Optics, Equipment
Reloading
new to wildcatting...help!
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<blockquote data-quote="3sixbits" data-source="post: 66824" data-attributes="member: 3661"><p>Centre Punch: All ctg cases have been annealed from below the shoulder. The reason we don't see the discoloration on most commercial brass as the maker polishes the cases after they final draw and pinch trim. All military brass on the other hand is not polished after the final draw. Cartridge cases are annealed a number of times during all the stages of manufacturing. The head stamp is even important to the hardness of the case as the case has been annealed and the case needs to be hardened at the head. ( a soft head case is deadly) If you can take the time to view the 50BMG link you can readily see the flame bars that stops the flame going any deeper (further down towards the head). Why is this annealing so important to forming? Well brass hardens two different ways. 1. Work hardens 2. Season hardens. The last can be seen in old brass cases that were loaded many years ago, the necks will show cracks. We the re loader do not spend to much time trying to form from 50+ year old military brass (like we did as kids). So the work harding we deal with comes from repeated firings and reloads. This working of the brass hardens it to the point of being brittle. We usually see this after we fire the ctg. Starting with new unfired brass we don't need to anneal. However if we are going to make a lot of change in forming then even with unfired ctg. we do need to anneal! Please read about annealing this is such and important subject that we need to understand the subject to it's fullest! My good friend Dr. Ken Howell wrote the book that covers this subject so vary well. The article on the 50BMG web-site is written by the Dr. and is a great read. Even better is his book. One of many hundreds of books in my collection of firearms books and "one of the vary best"! Hope I have made this clear? If not let me know! /ubbthreads/images/graemlins/wink.gif</p></blockquote><p></p>
[QUOTE="3sixbits, post: 66824, member: 3661"] Centre Punch: All ctg cases have been annealed from below the shoulder. The reason we don't see the discoloration on most commercial brass as the maker polishes the cases after they final draw and pinch trim. All military brass on the other hand is not polished after the final draw. Cartridge cases are annealed a number of times during all the stages of manufacturing. The head stamp is even important to the hardness of the case as the case has been annealed and the case needs to be hardened at the head. ( a soft head case is deadly) If you can take the time to view the 50BMG link you can readily see the flame bars that stops the flame going any deeper (further down towards the head). Why is this annealing so important to forming? Well brass hardens two different ways. 1. Work hardens 2. Season hardens. The last can be seen in old brass cases that were loaded many years ago, the necks will show cracks. We the re loader do not spend to much time trying to form from 50+ year old military brass (like we did as kids). So the work harding we deal with comes from repeated firings and reloads. This working of the brass hardens it to the point of being brittle. We usually see this after we fire the ctg. Starting with new unfired brass we don't need to anneal. However if we are going to make a lot of change in forming then even with unfired ctg. we do need to anneal! Please read about annealing this is such and important subject that we need to understand the subject to it's fullest! My good friend Dr. Ken Howell wrote the book that covers this subject so vary well. The article on the 50BMG web-site is written by the Dr. and is a great read. Even better is his book. One of many hundreds of books in my collection of firearms books and "one of the vary best"! Hope I have made this clear? If not let me know! [img]/ubbthreads/images/graemlins/wink.gif[/img] [/QUOTE]
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Reloading
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