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Old 11-24-2006 | 04:12 AM
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HighDesertWolf
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From: A flat lander lost in the mountains of Northern,AZ
Default RE: The theory behind the 6.8mm Remington SPC

ORIGINAL: BrutalAttack

ORIGINAL: HighDesertWolf

ORIGINAL: BrutalAttack

Geneva Convention states we cannot use an expandable bullet. So what makes the 6.8 better/more deadly?

It certainly doesn't have much in teh way of power/energy.
how do you figure?? the 6.8 has a ton more thump than a 5.56mm with the .277 dia bullet, higher bullet weights (100 - 115 grain) and much higher BC making the 6.8 much more powerful then 5.56mm.

from the muzzle to 1000 yards the 6.8 spc has roughly twice the kinetic energy of the 5.56mm. Power and energy wise the 6.8 spc is very comparable to a 250 savage which is known as a really good deer cartridge.
No it doesn't. I has between 200-300 ft/lbs more energy at every range than the 6.8. I looked at every round Remington has for both. They aren't that far apart. And the trajectory on the 6.8 is less flat.

Also the BC on the 6.8 isn't any higher than for a .223 match bullet.

The .308 has more than 1k ft/lbs at every range and also shoots flatter!

Do you see where I'm coming from?

I'm sure you're not trying to blow smoke up my ass but a 200 ft/lb improvement isn't much of an improvement.

no I dont because you are comparing a 223 match bullet to .277" dia hunting bullets which will have far lower BC's then match bullets...... gotta compare apples with apples here buddy....

I got my figures using long range ballistic tables in the back of my RCBS reloading manual. I used the BC's of a 62 grain .224 dia bthp match bullet and a 115 grain .277 dia. bthp match bullet. when using the given chart for specific yardage for that specific BC and velocity range. then using the kinetic energy conversion equasion also in the book and converting all the data for kinetic energy from the velocity I determined that the 6.8 spc with the same style of bullet as a .223 would have atleast twice the KE out to 500 yards I then confirmed my findings on my buddies sierra ballistic software and also determined my finding were also true for ranges from 500 to 1000 yards.
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