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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Duplicate 7-08 in a smaller bore?
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<blockquote data-quote="Rflshootr" data-source="post: 1705773" data-attributes="member: 10284"><p>Think of it this way....the base of the bullet is like a piston. A larger bore diameter gives more surface area for the gases to push against. So all things being equal, the larger diameter will give more velocity with the same amount of powder/pressure. To increase velocity of the smaller bore size, you need more pressure, which means more powder, which means an increase in recoil. Just for curiosity sake, look at your load data and compare the 260, 7-08 and the 308 with equal weight bullets and you'll see the proof. They are all the same parent case and as long as the barrel lengths are approximately the same length, you'll see that the 308 will give more velocity but your b.c. will be lower for the same weight bullet. Now all you have to figure out is which combination suits your need the best.</p></blockquote><p></p>
[QUOTE="Rflshootr, post: 1705773, member: 10284"] Think of it this way....the base of the bullet is like a piston. A larger bore diameter gives more surface area for the gases to push against. So all things being equal, the larger diameter will give more velocity with the same amount of powder/pressure. To increase velocity of the smaller bore size, you need more pressure, which means more powder, which means an increase in recoil. Just for curiosity sake, look at your load data and compare the 260, 7-08 and the 308 with equal weight bullets and you'll see the proof. They are all the same parent case and as long as the barrel lengths are approximately the same length, you'll see that the 308 will give more velocity but your b.c. will be lower for the same weight bullet. Now all you have to figure out is which combination suits your need the best. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Duplicate 7-08 in a smaller bore?
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