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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm vs. .30 cal
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<blockquote data-quote="Flybuster" data-source="post: 158481" data-attributes="member: 8250"><p>If the barrel length, twist rate, powder charge and bullet weight are the same for both calibers the muzzle velocity will be higher for the wider bore. There is more surface for the gasses to push against with a 30 caliber than a 28 caliber. But the 28 caliber will also have the higher Ballistic Coefficeint so it will retain velocity better than the comparable 30 caliber.</p></blockquote><p></p>
[QUOTE="Flybuster, post: 158481, member: 8250"] If the barrel length, twist rate, powder charge and bullet weight are the same for both calibers the muzzle velocity will be higher for the wider bore. There is more surface for the gasses to push against with a 30 caliber than a 28 caliber. But the 28 caliber will also have the higher Ballistic Coefficeint so it will retain velocity better than the comparable 30 caliber. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm vs. .30 cal
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