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The Range
Ammo & Reloading
9mm subsonic... Why 147gn bullet?
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<blockquote data-quote="Dr_Mitch" data-source="post: 1511282" data-attributes="member: 7417"><p>It takes more energy to overcome the inertia of a heavier weight than a lighter weight. Heavier bullets require more energy input to travel the same velocity as lighter weight bullets. The speed of sound is purely a measurement of velocity. If your powder charge for two different bullets is 5 grains, and your firing a 115 gr bullet and a 147 gr bullet, the 147 gr bullet will have a dramatically lower velocity than the 115 gr bullet. Check out a secondary-school physics book, loc dog.</p></blockquote><p></p>
[QUOTE="Dr_Mitch, post: 1511282, member: 7417"] It takes more energy to overcome the inertia of a heavier weight than a lighter weight. Heavier bullets require more energy input to travel the same velocity as lighter weight bullets. The speed of sound is purely a measurement of velocity. If your powder charge for two different bullets is 5 grains, and your firing a 115 gr bullet and a 147 gr bullet, the 147 gr bullet will have a dramatically lower velocity than the 115 gr bullet. Check out a secondary-school physics book, loc dog. [/QUOTE]
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9mm subsonic... Why 147gn bullet?
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