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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Stability Formula for Aluminum Tipped Bullets (Spreadsheet linked)
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<blockquote data-quote="trickytune" data-source="post: 995044" data-attributes="member: 69289"><p>I have measured Berger 52g .224 target at 4.5mm cavity (.177") and the 6.5mm Berger hybrid at 5mm cavity (.197") so without getting my hands on the actual thing I would estimate the 75-77g Berger cavity around .177". Most likely I will just use 77g Custom Competitions or Berger 77g OTM. Here is the output data I get on Berger OTM. </p><p>Caliber 0.224</p><p>Bullet Weight 77</p><p>Bullet Length 1.029</p><p>Barrel Twist 9</p><p>muzzle velocity 2500</p><p>Temperature 59</p><p>Pressure 29.92</p><p>Bullet Length 0.852</p><p> </p><p>Sg(CD) = 1.207</p><p>Sg(PT) = 1.725</p><p>Sg(OTM) =1.570</p><p>Sg(AT)= 1.622</p><p> </p><p></p><p>So this changes things from not really stable enough to completely stable. It does not get that cold here.</p></blockquote><p></p>
[QUOTE="trickytune, post: 995044, member: 69289"] I have measured Berger 52g .224 target at 4.5mm cavity (.177") and the 6.5mm Berger hybrid at 5mm cavity (.197") so without getting my hands on the actual thing I would estimate the 75-77g Berger cavity around .177". Most likely I will just use 77g Custom Competitions or Berger 77g OTM. Here is the output data I get on Berger OTM. Caliber 0.224 Bullet Weight 77 Bullet Length 1.029 Barrel Twist 9 muzzle velocity 2500 Temperature 59 Pressure 29.92 Bullet Length 0.852 Sg(CD) = 1.207 Sg(PT) = 1.725 Sg(OTM) =1.570 Sg(AT)= 1.622 So this changes things from not really stable enough to completely stable. It does not get that cold here. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Stability Formula for Aluminum Tipped Bullets (Spreadsheet linked)
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