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Got a lizard... From Kirby!!
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<blockquote data-quote="Len Backus" data-source="post: 271928" data-attributes="member: 1"><p>grit, I have not shot the 189's but my feeble memory tells me that they are the same length as the 176. The greater weight is from the non-lead guts which gives it a higher density. Please measure the length and I will compare it to my 176's. Twist requirements are related only to length, not weight. In which case the normal twist would be 9. In recent years I have been using 8.75 or 8.5 to be totally sure in all atmospheric situations such as extreme cold at lower altitudes when the air is most dense.</p><p></p><p><a href="http://www.riflebarrels.com/articles/bullets_ballastics/effects_altitude_temperature_rifling_twist.htm" target="_blank">Ballistic effects on twist</a></p></blockquote><p></p>
[QUOTE="Len Backus, post: 271928, member: 1"] grit, I have not shot the 189's but my feeble memory tells me that they are the same length as the 176. The greater weight is from the non-lead guts which gives it a higher density. Please measure the length and I will compare it to my 176's. Twist requirements are related only to length, not weight. In which case the normal twist would be 9. In recent years I have been using 8.75 or 8.5 to be totally sure in all atmospheric situations such as extreme cold at lower altitudes when the air is most dense. [URL="http://www.riflebarrels.com/articles/bullets_ballastics/effects_altitude_temperature_rifling_twist.htm"]Ballistic effects on twist[/URL] [/QUOTE]
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