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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
308 or 7mm-08 for mule deer?
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<blockquote data-quote="Rflshootr" data-source="post: 2068952" data-attributes="member: 10284"><p>One thing no one is telling you is, that if you look at the difference in velocity and do a comparison on a ballistic calculator, using the same weight bullet of the same type, or even 140 in the 7mm vs a 150 in a 308, with all the same environmental parameters, the 308 will give higher velocity and better down range performance in drop, drift and energy out to at least 600 yards. The reason being is that you can get about 100 fps more velocity with the 30 caliber, due to the fact that you have more surface area on the bottom of the bullet for the pressure to push against. Think of it this way....a 1" piston and a 3" piston both with the same pressure applied....the 3" will ALWAYS have more output because it has more square inches of surface to push against. If you don't believe it, compare apples and apples on a calculator and see what you get. The difference between the 2 is slight, but it is there. Compare Ballistic tips as an example or Sierra match kings in the 2 different calibers. It's exactly the same size case, both capable of the same pressures.</p></blockquote><p></p>
[QUOTE="Rflshootr, post: 2068952, member: 10284"] One thing no one is telling you is, that if you look at the difference in velocity and do a comparison on a ballistic calculator, using the same weight bullet of the same type, or even 140 in the 7mm vs a 150 in a 308, with all the same environmental parameters, the 308 will give higher velocity and better down range performance in drop, drift and energy out to at least 600 yards. The reason being is that you can get about 100 fps more velocity with the 30 caliber, due to the fact that you have more surface area on the bottom of the bullet for the pressure to push against. Think of it this way....a 1" piston and a 3" piston both with the same pressure applied....the 3" will ALWAYS have more output because it has more square inches of surface to push against. If you don't believe it, compare apples and apples on a calculator and see what you get. The difference between the 2 is slight, but it is there. Compare Ballistic tips as an example or Sierra match kings in the 2 different calibers. It's exactly the same size case, both capable of the same pressures. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
308 or 7mm-08 for mule deer?
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