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Rifles, Reloading, Optics, Equipment
Reloading
is it normal ???
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<blockquote data-quote="westcliffe01" data-source="post: 775080" data-attributes="member: 35183"><p>Have you considered what you are doing when you full length size?</p><p></p><p>You force the body of the die over the outside of the cartridge and the "slug" of the neck sizer through the neck (it goes in easy since the neck is expanded after firing). The body of the die compresses the diameter of the cartridge a little smaller, since it expanded to fill the chamber, particularly near the front. The top part of the die (the neck area) shrinks the neck of the cartridge smaller than the final diameter it needs to be.</p><p></p><p>Then when you raise the die, the slug passes through the inside of the neck from the bottom to the top, expanding it to the correct inside diameter to fit the bullet. The fact that you pull it through from the bottom to the top, is why the neck becomes longer (one of the reasons). The second reason is that if you fire high pressure loads, the brass will actually flow as if it was putty from the bottom to the top because of the effect of the high pressure/ velocity gases.</p><p></p><p>You would do well to trim all your brass exactly the same length. Then if you check the length after it is fired, you get a good feeling for the impact your loads have on it. The more lengthening you see, the shorter the life of the brass will be before you have to throw it away. If your head space is "loose" the bottom of the cartridge will also expand until it touches the bolt face and when you re-size it the part that stretched does not become thicker again. Next time you shoot it, it stretches again and gets thinner still. Only so much of this can go on before is ruptures and that will not be a good day for you....</p><p></p><p>So if you are shooting a bolt gun or a single shot, do NOT full length re-size. Just get a Lee collet type neck sizer and use it to shrink the neck only. Your brass should fit your chamber perfectly and if you do this it will last much longer.</p></blockquote><p></p>
[QUOTE="westcliffe01, post: 775080, member: 35183"] Have you considered what you are doing when you full length size? You force the body of the die over the outside of the cartridge and the "slug" of the neck sizer through the neck (it goes in easy since the neck is expanded after firing). The body of the die compresses the diameter of the cartridge a little smaller, since it expanded to fill the chamber, particularly near the front. The top part of the die (the neck area) shrinks the neck of the cartridge smaller than the final diameter it needs to be. Then when you raise the die, the slug passes through the inside of the neck from the bottom to the top, expanding it to the correct inside diameter to fit the bullet. The fact that you pull it through from the bottom to the top, is why the neck becomes longer (one of the reasons). The second reason is that if you fire high pressure loads, the brass will actually flow as if it was putty from the bottom to the top because of the effect of the high pressure/ velocity gases. You would do well to trim all your brass exactly the same length. Then if you check the length after it is fired, you get a good feeling for the impact your loads have on it. The more lengthening you see, the shorter the life of the brass will be before you have to throw it away. If your head space is "loose" the bottom of the cartridge will also expand until it touches the bolt face and when you re-size it the part that stretched does not become thicker again. Next time you shoot it, it stretches again and gets thinner still. Only so much of this can go on before is ruptures and that will not be a good day for you.... So if you are shooting a bolt gun or a single shot, do NOT full length re-size. Just get a Lee collet type neck sizer and use it to shrink the neck only. Your brass should fit your chamber perfectly and if you do this it will last much longer. [/QUOTE]
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Reloading
is it normal ???
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