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Rifles, Reloading, Optics, Equipment
Reloading
Neck Sizing Vs. Full Length Sizing and Neck Tension
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<blockquote data-quote="Mike Matteson" data-source="post: 2765643" data-attributes="member: 101791"><p>You are lucky there on the Winchester brass. I would show case separation in 3 to 4 firing. That ended with neck sizing. A lot of people don't like belted mag because of the separations. I stubble on to it a great many years ago. Part of that was I was using a 300WM NS Die for my 308NM. It only size about 3/4 or so of the neck.</p><p>Now I haven't tryied bumping my case, but will give it try someday. </p><p>Neck tension: Most of that is by how they group using different tensions. There is several people that feel that tension needs to be set by first under sizing the neck, then using a mandrel to expand the neck out to the size they want to set tension. You will need to watch for spring back on the necks. It will show up in a couple of days, I believe. I don't have problems with that. I feel most aren't cutting their necks for thickness, so the uneven neck is being put into the inside of the neck. That is the reason I believe the use of the mandral is to push even portion back out to the outside of the neck. Now I contine that if the neck is even to start with it doesn't matter or no mandrel is needed. </p><p>I feel that cutting your necks for thickness and at the same time even the wall of the neck out so it's not needed. </p><p>Something else to work on! <img class="smilie smilie--emoji" loading="lazy" alt="😂" title="Face with tears of joy :joy:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f602.png" data-shortname=":joy:" /></p></blockquote><p></p>
[QUOTE="Mike Matteson, post: 2765643, member: 101791"] You are lucky there on the Winchester brass. I would show case separation in 3 to 4 firing. That ended with neck sizing. A lot of people don't like belted mag because of the separations. I stubble on to it a great many years ago. Part of that was I was using a 300WM NS Die for my 308NM. It only size about 3/4 or so of the neck. Now I haven't tryied bumping my case, but will give it try someday. Neck tension: Most of that is by how they group using different tensions. There is several people that feel that tension needs to be set by first under sizing the neck, then using a mandrel to expand the neck out to the size they want to set tension. You will need to watch for spring back on the necks. It will show up in a couple of days, I believe. I don't have problems with that. I feel most aren't cutting their necks for thickness, so the uneven neck is being put into the inside of the neck. That is the reason I believe the use of the mandral is to push even portion back out to the outside of the neck. Now I contine that if the neck is even to start with it doesn't matter or no mandrel is needed. I feel that cutting your necks for thickness and at the same time even the wall of the neck out so it's not needed. Something else to work on! 😂 [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck Sizing Vs. Full Length Sizing and Neck Tension
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