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Rifles, Reloading, Optics, Equipment
Reloading
Concentricity gauges and bullet lube
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<blockquote data-quote="Rardoin" data-source="post: 1964236" data-attributes="member: 114954"><p>None... I'll qualify that statement. I have a 21st century gauge. It is fantastic. The only thing I use it for is checking/adjusting bullet runout on a dummy round used for checking my distance to the lands with the stripped bolt method (more that 0.001" runout interferes with the measurement in some barrels). As far as accuracy goes, I've witnessed a 6 Dasher shooter set the 20 shot 600yd score record and he then shot 999/1000 possible points over the remainder of the match. He burned through extra rounds setting the record which left him having to shoot some of the last match of the tournament using 'cull rounds' that had runout over 0.004"....some as high as 0.008". These rounds shot with the same precision as the ones used to set the record of 22 consecutive X's at 600yds (22 touching a 3" circle). That shooter no longer worries about concentricity once his loading process is producing rounds under about 0.004" TIR. If you are new I would spend the money on high quality dies. That is my opinion borne from my own experience and those of others. As far as lube I use graphite in some cartridges and some I leave the lube I used to expand the neck in place when I seat the bullets (it is a lanolin based lube). In cases that have a good carbon layer lube is not needed.</p></blockquote><p></p>
[QUOTE="Rardoin, post: 1964236, member: 114954"] None... I'll qualify that statement. I have a 21st century gauge. It is fantastic. The only thing I use it for is checking/adjusting bullet runout on a dummy round used for checking my distance to the lands with the stripped bolt method (more that 0.001" runout interferes with the measurement in some barrels). As far as accuracy goes, I've witnessed a 6 Dasher shooter set the 20 shot 600yd score record and he then shot 999/1000 possible points over the remainder of the match. He burned through extra rounds setting the record which left him having to shoot some of the last match of the tournament using 'cull rounds' that had runout over 0.004"....some as high as 0.008". These rounds shot with the same precision as the ones used to set the record of 22 consecutive X's at 600yds (22 touching a 3" circle). That shooter no longer worries about concentricity once his loading process is producing rounds under about 0.004" TIR. If you are new I would spend the money on high quality dies. That is my opinion borne from my own experience and those of others. As far as lube I use graphite in some cartridges and some I leave the lube I used to expand the neck in place when I seat the bullets (it is a lanolin based lube). In cases that have a good carbon layer lube is not needed. [/QUOTE]
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Concentricity gauges and bullet lube
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