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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning; take me to school
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<blockquote data-quote="Bullet bumper" data-source="post: 662121" data-attributes="member: 17844"><p>Inside neck reaming has limitations in as much as you only have one size in each tool and that is the reamer . So if you buy the wrong reamer or the case necks change in thickness due to a different batch , then you don't have the right size.</p><p>Outside neck turning is way more flexible as you can adjust your cut for any case neck thickness . </p><p>You can cut down on the shoulder with just a slight skim that just marks the shoulder it will not weaken the case . I have done it thousands of times or more with no problem . </p><p>A dedicated Sinclair neck turner works good and I like it better than those adaptors that go in case trimmers . </p><p>If the gun is used for hunting then some clearance in the neck is required as it only takes a small bit of rubbish like an unburnt granule of powder to jam the round and stop it chambering. </p><p>If you have to neck turn then I would consider partial neck sizing using a bushing or collet die and then body sizing with a body die. This separates the two jobs so full length sizing will not be required . Avoid expander ball sizing dies as they just screw up the turned neck.</p><p>Most 7 mm Rem mag chambers have approx. a .317 neck so are you sure that the .313 neck diameter round does not fit because of the neck and not some other part of the case .</p><p>What is the neck dimention in the custom chamber ? It might be marked on the barrel .</p></blockquote><p></p>
[QUOTE="Bullet bumper, post: 662121, member: 17844"] Inside neck reaming has limitations in as much as you only have one size in each tool and that is the reamer . So if you buy the wrong reamer or the case necks change in thickness due to a different batch , then you don't have the right size. Outside neck turning is way more flexible as you can adjust your cut for any case neck thickness . You can cut down on the shoulder with just a slight skim that just marks the shoulder it will not weaken the case . I have done it thousands of times or more with no problem . A dedicated Sinclair neck turner works good and I like it better than those adaptors that go in case trimmers . If the gun is used for hunting then some clearance in the neck is required as it only takes a small bit of rubbish like an unburnt granule of powder to jam the round and stop it chambering. If you have to neck turn then I would consider partial neck sizing using a bushing or collet die and then body sizing with a body die. This separates the two jobs so full length sizing will not be required . Avoid expander ball sizing dies as they just screw up the turned neck. Most 7 mm Rem mag chambers have approx. a .317 neck so are you sure that the .313 neck diameter round does not fit because of the neck and not some other part of the case . What is the neck dimention in the custom chamber ? It might be marked on the barrel . [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning; take me to school
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