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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
110 gr gsc elk bullet
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<blockquote data-quote="Gerard Schultz" data-source="post: 958143" data-attributes="member: 51"><p>Dr Vette</p><p></p><p>In the link you gave, the chart on which the stability factor is shown, requires a gyroscopic stability of 1.4 and that asks for a 1:8" twist rate. The 130gr HV bullet will not stabilise in a 1:10" twist. </p><p></p><p>The .270" calibers all come standard with a 10" twist unless the rifle is fitted with a custom barrel that is tighter. </p><p></p><p>For a 10" twist, the right length is therefore the 110gr HV bullet.</p><p></p><p><a href="http://www.gsgroup.co.za/270110HV068.html" target="_blank">GS CUSTOM BULLETS - Specifications for use</a></p><p></p><p>When it comes to HV monometal bullets, weight is no longer important. We regularly shoot black wildebeest (300lbs to 400lbs) with 40gr HVs from a 22-250 and many eland (1000lbs to 2000lbs) have been shot successfully with 69gr HV bullets and a 243Win.</p><p></p><p>Sectional density does not automatically give penetration. One requires speed as well as weight and lighter bullets go faster than heavier bullets. When the lighter and faster bullet is also more robust than the heavier and slower bullet, good things happen.</p></blockquote><p></p>
[QUOTE="Gerard Schultz, post: 958143, member: 51"] Dr Vette In the link you gave, the chart on which the stability factor is shown, requires a gyroscopic stability of 1.4 and that asks for a 1:8" twist rate. The 130gr HV bullet will not stabilise in a 1:10" twist. The .270" calibers all come standard with a 10" twist unless the rifle is fitted with a custom barrel that is tighter. For a 10" twist, the right length is therefore the 110gr HV bullet. [url=http://www.gsgroup.co.za/270110HV068.html]GS CUSTOM BULLETS - Specifications for use[/url] When it comes to HV monometal bullets, weight is no longer important. We regularly shoot black wildebeest (300lbs to 400lbs) with 40gr HVs from a 22-250 and many eland (1000lbs to 2000lbs) have been shot successfully with 69gr HV bullets and a 243Win. Sectional density does not automatically give penetration. One requires speed as well as weight and lighter bullets go faster than heavier bullets. When the lighter and faster bullet is also more robust than the heavier and slower bullet, good things happen. [/QUOTE]
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110 gr gsc elk bullet
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