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Rifles, Reloading, Optics, Equipment
Reloading
Redding type S neck sizing die question
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<blockquote data-quote="boomtube" data-source="post: 882916" data-attributes="member: 9215"><p>"... <em>but the springback continues over time to counter last action, which in this case would be reducing bullet grip</em>"</p><p> using bushing sizers to get a precise 'neck tension' and you're finding some of it. </p><p> </p><p>That's true. Bushings are only fair, at best, for making necks the same outside diameter each time because neck thicknesses and hardness vs. springback varies a bit each cycle. Then a bigger issue is that no matter if you turn the necks to a uniform thickness or not, the actual bullet grip will still vary because of individual case neck hardness variations. Even with exact case neck thickness and length dimensions it's quite easy to feel actual 'grip' differences during seating.</p><p> </p><p>Nor is there any magic in expanders in or out of a sizer; no matter how straight the neck may be before seating we can't shoot it that way! Seating a bullet will do more neck expanding as it enters than a normal expander itself and that one glaring fact is overlooked in all of the expander/no expander sizing arguments I've ever seen. Bullets are going to run in leaning towards the weak side of the necks and there's little we can do to stop it. All of the threaded die seating stems I've seen - and that's quite a few - are much too loosely fitted inside the die for the common 'seat part way and rotate the case' suggestion to accomplish anything useful - once a bullet starts in tilted it tends to stay tilted.</p><p> </p><p>Bottom line, bushing sizers were first made for the specal problems encountered by BR shooters with tight neck chambers that required neck thinning just to be able chamber a round; hardly any of the rest of us have that so we really don't need those dies. But the makers are quite happy to sell them to us!</p><p> </p><p>If you want the most concentric ammo you can make for a SAAMI chamber, use a Lee collect neck die and a Forster BR or Redding Comp seater. Add a body die to be used along with the collet die when you want to do FL sizing. You will then be doing as well as can be done and it won't cost you a fortune for bushing dies giving little or no improvement.</p><p> </p><p>IMHO. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll Eyes :rolleyes:" loading="lazy" data-shortname=":rolleyes:" /></p></blockquote><p></p>
[QUOTE="boomtube, post: 882916, member: 9215"] "... [I]but the springback continues over time to counter last action, which in this case would be reducing bullet grip[/I]" using bushing sizers to get a precise 'neck tension' and you're finding some of it. That's true. Bushings are only fair, at best, for making necks the same outside diameter each time because neck thicknesses and hardness vs. springback varies a bit each cycle. Then a bigger issue is that no matter if you turn the necks to a uniform thickness or not, the actual bullet grip will still vary because of individual case neck hardness variations. Even with exact case neck thickness and length dimensions it's quite easy to feel actual 'grip' differences during seating. Nor is there any magic in expanders in or out of a sizer; no matter how straight the neck may be before seating we can't shoot it that way! Seating a bullet will do more neck expanding as it enters than a normal expander itself and that one glaring fact is overlooked in all of the expander/no expander sizing arguments I've ever seen. Bullets are going to run in leaning towards the weak side of the necks and there's little we can do to stop it. All of the threaded die seating stems I've seen - and that's quite a few - are much too loosely fitted inside the die for the common 'seat part way and rotate the case' suggestion to accomplish anything useful - once a bullet starts in tilted it tends to stay tilted. Bottom line, bushing sizers were first made for the specal problems encountered by BR shooters with tight neck chambers that required neck thinning just to be able chamber a round; hardly any of the rest of us have that so we really don't need those dies. But the makers are quite happy to sell them to us! If you want the most concentric ammo you can make for a SAAMI chamber, use a Lee collect neck die and a Forster BR or Redding Comp seater. Add a body die to be used along with the collet die when you want to do FL sizing. You will then be doing as well as can be done and it won't cost you a fortune for bushing dies giving little or no improvement. IMHO. :rolleyes: [/QUOTE]
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Redding type S neck sizing die question
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