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Rifles, Reloading, Optics, Equipment
Reloading
Neck bushing dies
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<blockquote data-quote="uncleB" data-source="post: 186402" data-attributes="member: 4679"><p>Natty,</p><p>I think you have a few misconception's on this you say "wouldn't a pricey seater die that assured good bullet concentricity with minimal runout do more for accuracy". A pricey seater die will not improve your concentricity but it wont make it worse. for example if you have a sized case that the neck has .005" run out when you seat your bullet with a "pricey seater die" it will still have .005" runout with a standard seater die and the same case your runout after seating the bullet might be .005" or it might be .006" or.007".</p><p></p><p>The .005" runout in the first place comes from the sizing die and most (not all) of the time the culprit is the expander ball. in your "plain jane" dies as you run a case in it gets the neck sized down many thousandth's too far, then as the case is extracted from the die it goes over the expander ball and it stretches the neck back out. It is this oversizing that is the main cause of runout and poor case life. If you use a proper size bushing in a bushing die then runout is insignificant and your brass lasts much longer.</p><p>UB</p></blockquote><p></p>
[QUOTE="uncleB, post: 186402, member: 4679"] Natty, I think you have a few misconception's on this you say "wouldn't a pricey seater die that assured good bullet concentricity with minimal runout do more for accuracy". A pricey seater die will not improve your concentricity but it wont make it worse. for example if you have a sized case that the neck has .005" run out when you seat your bullet with a "pricey seater die" it will still have .005" runout with a standard seater die and the same case your runout after seating the bullet might be .005" or it might be .006" or.007". The .005" runout in the first place comes from the sizing die and most (not all) of the time the culprit is the expander ball. in your "plain jane" dies as you run a case in it gets the neck sized down many thousandth's too far, then as the case is extracted from the die it goes over the expander ball and it stretches the neck back out. It is this oversizing that is the main cause of runout and poor case life. If you use a proper size bushing in a bushing die then runout is insignificant and your brass lasts much longer. UB [/QUOTE]
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Reloading
Neck bushing dies
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