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Rifles, Reloading, Optics, Equipment
Reloading
Redding Type S dies and which mic/neck gauge.
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<blockquote data-quote="Bart B" data-source="post: 501690" data-attributes="member: 5302"><p>Brian, if you've already got an RCBS full length sizing die, I'd take it to a 'smith and have him lap the neck out to about 3 thousandths smaller than a loaded round's outside neck diameter. You'll end up with a die just as good as a Redding type S bushing die. This is what folks did decades ago when they wanted to full length size rimless bottleneck cases and not have to use an expander ball. the only thing is you have to have the neck lapped out correctly else it'll be out of round and may be oversize. If it's oversize, then you'll need a new die.</p><p></p><p>Conversely, a type S Redding die does the same thing then you can get a bushing or two for different neck wall thicknesses and won't have to turn case necks.</p><p></p><p>Most any standard seating die works well when cases are full length sized without expander balls bending their necks. You don't need a micrometer die but they are neat and nice to use.</p><p></p><p>For what it's worth, Sierra Bullets' has been full length sizing all their fired rifle cases used to test their bullets for accuracy since the 1950's. I doubt anybody shoots 'em as accurate as they do full length siziing their fired cases with Redding type s or standard full length dies. The key stuff to remember and do is to set the fired case neck back no more than 2 thousandths; you'll need a case headspace gage such as the RCBS Precision Mic to accurately measure case headspace from shoulder to case head. And don't reduce body diameters by more than 2 thousandths.</p><p></p><p>I don't think you'll need a ball micrometer to measure neck wall thickness. A good vernier caliper works just as good properly used and it can also measure cartridge over all length as well as case dimensions such as loaded round neck diameters.</p></blockquote><p></p>
[QUOTE="Bart B, post: 501690, member: 5302"] Brian, if you've already got an RCBS full length sizing die, I'd take it to a 'smith and have him lap the neck out to about 3 thousandths smaller than a loaded round's outside neck diameter. You'll end up with a die just as good as a Redding type S bushing die. This is what folks did decades ago when they wanted to full length size rimless bottleneck cases and not have to use an expander ball. the only thing is you have to have the neck lapped out correctly else it'll be out of round and may be oversize. If it's oversize, then you'll need a new die. Conversely, a type S Redding die does the same thing then you can get a bushing or two for different neck wall thicknesses and won't have to turn case necks. Most any standard seating die works well when cases are full length sized without expander balls bending their necks. You don't need a micrometer die but they are neat and nice to use. For what it's worth, Sierra Bullets' has been full length sizing all their fired rifle cases used to test their bullets for accuracy since the 1950's. I doubt anybody shoots 'em as accurate as they do full length siziing their fired cases with Redding type s or standard full length dies. The key stuff to remember and do is to set the fired case neck back no more than 2 thousandths; you'll need a case headspace gage such as the RCBS Precision Mic to accurately measure case headspace from shoulder to case head. And don't reduce body diameters by more than 2 thousandths. I don't think you'll need a ball micrometer to measure neck wall thickness. A good vernier caliper works just as good properly used and it can also measure cartridge over all length as well as case dimensions such as loaded round neck diameters. [/QUOTE]
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Redding Type S dies and which mic/neck gauge.
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