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<blockquote data-quote="codyadams" data-source="post: 1370371" data-attributes="member: 87243"><p>What is also being forgotten here is the difference the plastic tip vs. a BTHP design makes in stability. </p><p></p><p>The Berger calculator is for BTHP type bullets. If you run the stability calculator on JBM ballistics and factor in the plastic tip length, the stability at sea level is .997 vs .708 that you get from the Berger calculator. This is however, still "unstable", but it is higher than what Berger gives. A bullet can still shoot accurate when it is somewhat unstable, but your BC is compromised to an extent. </p><p></p><p>I never myself shot a 53 grain v-max in my 14 twist 22-250, but I did however shoot the 55 grain v-max, and at my elevation with a pressure of 23.25 (6600 ft elevation) it's stability is 1.433 according to JBM, 1.112 ac 29.95 (sea level) pressure, and it shot very well, approximately half MOA. 1.433 is very close to the acceptable 1.5, and I did end up using the 40 grain v-max as it did shoot a little better, .2-.3 MOA groups. </p><p></p><p>Moral of the story, it may not have an acceptable stability factor, but it may still shoot accurate. Now can we be done?</p></blockquote><p></p>
[QUOTE="codyadams, post: 1370371, member: 87243"] What is also being forgotten here is the difference the plastic tip vs. a BTHP design makes in stability. The Berger calculator is for BTHP type bullets. If you run the stability calculator on JBM ballistics and factor in the plastic tip length, the stability at sea level is .997 vs .708 that you get from the Berger calculator. This is however, still "unstable", but it is higher than what Berger gives. A bullet can still shoot accurate when it is somewhat unstable, but your BC is compromised to an extent. I never myself shot a 53 grain v-max in my 14 twist 22-250, but I did however shoot the 55 grain v-max, and at my elevation with a pressure of 23.25 (6600 ft elevation) it's stability is 1.433 according to JBM, 1.112 ac 29.95 (sea level) pressure, and it shot very well, approximately half MOA. 1.433 is very close to the acceptable 1.5, and I did end up using the 40 grain v-max as it did shoot a little better, .2-.3 MOA groups. Moral of the story, it may not have an acceptable stability factor, but it may still shoot accurate. Now can we be done? [/QUOTE]
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