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Hunting
Long Range Hunting & Shooting
Factory loads OK, handloads keyhole?
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<blockquote data-quote="Bullet bumper" data-source="post: 1306010" data-attributes="member: 17844"><p>It's not the weight of the bullet it's the length that sets the twist rate needed .</p><p>It calculates as unstable . It could even be a combination of instability and jacket deformation . The thickness of the jacket , the type of rifling , the smoothness of the bore , the amount of fouling present , the length of the barrel , the velocity how hard it's driven are all factors affecting potential bullet blow up. </p><p>It's hard to know what is actually getting to the target and showing the keyholing. </p><p>The full bullet or just the core . Generally at that velocity if the jacket pops they blow right up and disintegrate . The bullet is long for a 55 grain flat base so it could be made wrong inside and have a very short core causing the bullets center of pressure to be all wrong for a 1 in 14 twist . I would section the two bullets concerned and compare them . Remember the Varmint grenade and how it needed a very fast twist that was because of a very short core and nothing in the ogive .</p></blockquote><p></p>
[QUOTE="Bullet bumper, post: 1306010, member: 17844"] It's not the weight of the bullet it's the length that sets the twist rate needed . It calculates as unstable . It could even be a combination of instability and jacket deformation . The thickness of the jacket , the type of rifling , the smoothness of the bore , the amount of fouling present , the length of the barrel , the velocity how hard it's driven are all factors affecting potential bullet blow up. It's hard to know what is actually getting to the target and showing the keyholing. The full bullet or just the core . Generally at that velocity if the jacket pops they blow right up and disintegrate . The bullet is long for a 55 grain flat base so it could be made wrong inside and have a very short core causing the bullets center of pressure to be all wrong for a 1 in 14 twist . I would section the two bullets concerned and compare them . Remember the Varmint grenade and how it needed a very fast twist that was because of a very short core and nothing in the ogive . [/QUOTE]
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Factory loads OK, handloads keyhole?
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