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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet Penetration
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<blockquote data-quote="entoptics" data-source="post: 1864810" data-attributes="member: 104268"><p>Just a little data to illustrate "bigger is better", at least when comparing bullets with equal penetration, velocity, and relative expansion.</p><p></p><table style='width: 100%'><tr><td><strong>Caliber</strong></td><td><strong>1.5X Diam</strong></td><td><strong>1.5X Area</strong></td><td><strong>% more than 6.5 mm</strong></td></tr><tr><td>0.264</td><td>0.396</td><td>0.123</td><td>0%</td></tr><tr><td>0.277</td><td>0.416</td><td>0.136</td><td>10%</td></tr><tr><td>0.284</td><td>0.426</td><td>0.143</td><td>16%</td></tr><tr><td>0.308</td><td>0.462</td><td>0.168</td><td>36%</td></tr><tr><td>0.323</td><td>0.485</td><td>0.184</td><td>50%</td></tr><tr><td>0.338</td><td>0.507</td><td>0.202</td><td>64%</td></tr></table><p></p><p>While the 30 cal is only 1/6 larger diameter than the 26, after 1.5X expansion the frontal area is 1/3 more.</p><p></p><p>Even without the consequences of the temporary cavitation, more and larger bullet fragments, and greater energy transfer of the larger bullet, you're at minimum still going to "core out" a 1/3 larger hole.</p></blockquote><p></p>
[QUOTE="entoptics, post: 1864810, member: 104268"] Just a little data to illustrate "bigger is better", at least when comparing bullets with equal penetration, velocity, and relative expansion. [TABLE] [TR] [TD][B]Caliber[/B][/TD] [TD][B]1.5X Diam[/B][/TD] [TD][B]1.5X Area[/B][/TD] [TD][B]% more than 6.5 mm[/B][/TD] [/TR] [TR] [TD]0.264[/TD] [TD]0.396[/TD] [TD]0.123[/TD] [TD]0%[/TD] [/TR] [TR] [TD]0.277[/TD] [TD]0.416[/TD] [TD]0.136[/TD] [TD]10%[/TD] [/TR] [TR] [TD]0.284[/TD] [TD]0.426[/TD] [TD]0.143[/TD] [TD]16%[/TD] [/TR] [TR] [TD]0.308[/TD] [TD]0.462[/TD] [TD]0.168[/TD] [TD]36%[/TD] [/TR] [TR] [TD]0.323[/TD] [TD]0.485[/TD] [TD]0.184[/TD] [TD]50%[/TD] [/TR] [TR] [TD]0.338[/TD] [TD]0.507[/TD] [TD]0.202[/TD] [TD]64%[/TD] [/TR] [/TABLE] While the 30 cal is only 1/6 larger diameter than the 26, after 1.5X expansion the frontal area is 1/3 more. Even without the consequences of the temporary cavitation, more and larger bullet fragments, and greater energy transfer of the larger bullet, you're at minimum still going to "core out" a 1/3 larger hole. [/QUOTE]
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