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Rifles, Reloading, Optics, Equipment
Reloading
Full length sizing VS neck sizing
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<blockquote data-quote="manitou" data-source="post: 2565856" data-attributes="member: 105280"><p>No Sir. I use a Redding body die, sizing the body and achieving shoulder bump of .002". I then use a collet die with mandrel to "squeeze" the nick to a .002" inside friction fit on my bullet. Example: My bullet is .284" diameter. My preference is .002 seating tension, so I use a smaller mandrel, which allows for about .001-.002" springback. For MY needs and MY preferences, I use a .280 mandrel, which gives me about a .282" case mouth after sizing, accounting for springback.</p><p>In the past, I did use standard FL dies with the expander removed. Many still do. The removal of the expander prevents the expander from "pulling" your case neck/shoulder bump out of shape and thus potentially ruining your shoulder bump. Then you would use the die with the mandrel, which yes, the mandrel will open up your neck, but then when neck sized the neck will be set at or near the mandrel size.</p><p>Either way is a means to prevent the shoulder bump distortion by using an expander ball. As with all reloading, consistency and repeatability are the goals. Even if you achieve .003 or .004 neck tension, as long as they are all the same (or very close) then you are minimizing variances in shoulder bump, which can affect accuracy and brass life.</p><p>In short, the avoidance of shoulder bump distortion once the bump is set with the FL die, along with consistant neck tension are the ultimate goals.</p></blockquote><p></p>
[QUOTE="manitou, post: 2565856, member: 105280"] No Sir. I use a Redding body die, sizing the body and achieving shoulder bump of .002". I then use a collet die with mandrel to "squeeze" the nick to a .002" inside friction fit on my bullet. Example: My bullet is .284" diameter. My preference is .002 seating tension, so I use a smaller mandrel, which allows for about .001-.002" springback. For MY needs and MY preferences, I use a .280 mandrel, which gives me about a .282" case mouth after sizing, accounting for springback. In the past, I did use standard FL dies with the expander removed. Many still do. The removal of the expander prevents the expander from "pulling" your case neck/shoulder bump out of shape and thus potentially ruining your shoulder bump. Then you would use the die with the mandrel, which yes, the mandrel will open up your neck, but then when neck sized the neck will be set at or near the mandrel size. Either way is a means to prevent the shoulder bump distortion by using an expander ball. As with all reloading, consistency and repeatability are the goals. Even if you achieve .003 or .004 neck tension, as long as they are all the same (or very close) then you are minimizing variances in shoulder bump, which can affect accuracy and brass life. In short, the avoidance of shoulder bump distortion once the bump is set with the FL die, along with consistant neck tension are the ultimate goals. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Full length sizing VS neck sizing
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