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Rifles, Reloading, Optics, Equipment
Reloading
Neck Sizing
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<blockquote data-quote="Bullet bumper" data-source="post: 827592" data-attributes="member: 17844"><p>I agree. You will not get better bullet seating concentricity by only sizing 1/8 in a standard neck clearance chamber. The BR shooters may do that because the neck is a tight neck chamber and it does not expand much so the amount of resizing is very minimal . </p><p>You can do a partial neck sizing operation in any standard factory chamber but you need to size down 3/4 of the length of the neck to make sure you have enough length to align the bullet and neck tension to hold it. A long neck case is good for this operation. </p><p>BR shooters gently feed one round at a time by hand it's a different situation to hunting and normal shooting using magazines etc. and big kickers . </p><p>Forget using a standard full length sizing die . Buy a Lee collet die and put a washer over the case on top of the shell holder this will shorten the length sized and allow a slight extra shoulder for better alignment. </p><p>If the extra shoulder makes chambering a bit tight , size down the neck lenght more until it chambers nice. </p><p>However a very slight crush as the bolt closes is ok as it usualy dissapears after first firing and you have a nice minmum headspace case. It varies with different chambers and case designs. </p><p>However to preserve this slight shoulder you need to buy a body die to size the remainder of the body . </p><p>Using a standard type die to partial neck size is always a risk that on extracting the case the friction may pull the shoulder out and prevent easy chambering .</p></blockquote><p></p>
[QUOTE="Bullet bumper, post: 827592, member: 17844"] I agree. You will not get better bullet seating concentricity by only sizing 1/8 in a standard neck clearance chamber. The BR shooters may do that because the neck is a tight neck chamber and it does not expand much so the amount of resizing is very minimal . You can do a partial neck sizing operation in any standard factory chamber but you need to size down 3/4 of the length of the neck to make sure you have enough length to align the bullet and neck tension to hold it. A long neck case is good for this operation. BR shooters gently feed one round at a time by hand it's a different situation to hunting and normal shooting using magazines etc. and big kickers . Forget using a standard full length sizing die . Buy a Lee collet die and put a washer over the case on top of the shell holder this will shorten the length sized and allow a slight extra shoulder for better alignment. If the extra shoulder makes chambering a bit tight , size down the neck lenght more until it chambers nice. However a very slight crush as the bolt closes is ok as it usualy dissapears after first firing and you have a nice minmum headspace case. It varies with different chambers and case designs. However to preserve this slight shoulder you need to buy a body die to size the remainder of the body . Using a standard type die to partial neck size is always a risk that on extracting the case the friction may pull the shoulder out and prevent easy chambering . [/QUOTE]
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