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7mm08 vs .308

 
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  #1  
Old 08-07-2008, 10:38 PM
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7mm08 vs .308

ive been looking into the difference in energy of both the 708 and 308 with 140 and 150 grain bullets and the 708 just has more energy and looses speed far slower than the 308. what would everyone say to the idea that the 7mm08 is a better round for longer range hunting. say to 800m
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Old 08-08-2008, 12:16 AM
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Ballistically the 7-08 is hands down the better LR cartridge then the .308 Win. 2 reasons for this, one being the 7mm BC is hands down way better then .30 cal, and for two, smaller calibers with smaller bullets are usually faster, couple this with the better BC and it becomes easy to see why the 7-08 is better then the .308

Stick a 162g AMAX in that 7-08 and it spanks the 308 in every category...

Heck even the .260 with a 140g AMAX is better then the .308, maybe not in energy, but in drop and drift I know for a fact it is w/out even looking at the ballistic charts.

The .308 would be about the last cartridge I'd ever own...
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Old 08-08-2008, 12:53 AM
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Quote:
Originally Posted by remingtonman_25_06 View Post

Stick a 162g AMAX in that 7-08 and it spanks the 308 in every category...

??? I just ran the numbers on a 7mm-08 with the 162 AMAX vs a .308 with a 168 grain Berger VLDs. Unless I did something wrong, the .308 carried more energy down range. I used a mv of 2500 for the 7mm-08 (from accurate powder) and a mv of 2760 (what I get with my load) for the .308.

While I only practice with a .308, I feel it's a very capable caliber for hunting. At my elevation with the load I use, it produces 1000+ ft/lbs at 800 yards. Not too shabby...
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Old 08-08-2008, 01:20 AM
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Thats because your running the numbers with the 7-08 on the low end. How is it that its 260fps slower then the .308, with 6g less bullet??? I know the .30 cal bore will give you a little more velocity, but not 260fps more velocity... My guess is because your trying to defend the .308?? While its a "decent" caliber, the 7-08 is still better... Try again with the 7-08 at 2700fps which is real world velocity with the 162g bullet and see what you come up with then...
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Old 08-08-2008, 06:20 AM
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Quote:
Originally Posted by pstimac View Post
??? I just ran the numbers on a 7mm-08 with the 162 AMAX vs a .308 with a 168 grain Berger VLDs. Unless I did something wrong, the .308 carried more energy down range. I used a mv of 2500 for the 7mm-08 (from accurate powder) and a mv of 2760 (what I get with my load) for the .308.

While I only practice with a .308, I feel it's a very capable caliber for hunting. At my elevation with the load I use, it produces 1000+ ft/lbs at 800 yards. Not too shabby...

The high end load on accurate reloading dot com is 2760fps for the 162gr A-max in a 7mm-08.

A 162gr Amax vs a 168 Berger VLD at 1000yds, both at 2760, the A-max spanks the berger by nearly 200lbs energy and 20" less wind drift (10mph-90 degree)


BTW: IMHO, they are both capable long range rounds for antelope/deer size game.

AJ
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Last edited by AJ Peacock; 08-08-2008 at 06:25 AM.
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Old 08-08-2008, 08:35 AM
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Not trying to justify anything...just used the numbers from accurate powder's website. Didn't see accuatereloading.com's numbers.

Bullet Powder Grains Vel. Powder Grains Vel. C.U.P. Length SRA 168 HPBT

2015 31.5 2127 2015 35.0 2417 49,300 2.800"
2230 33.3 2123 2230 37.0 2413 49,500
2460 33.3 2159 2460 37.0 2453 50,100
2495 34.2 2202 2495 38.0 2502 52,000
2520 33.3 2116 2520 37.0 2404 49,400
4064 35.5 2153 4064 39.5 2447 48,600
2700 39.9 2157 2700 42.0 2451 47,300
4350 41.4 2284 4350 46.0 2596 50,400
3100 42.3 2102 3100 47.0 2389 42,600
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  #7  
Old 08-08-2008, 09:15 AM
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Quote:
A 162gr Amax vs a 168 Berger VLD at 1000yds, both at 2760, the
That's why people only show up once with 168s. After that they bring 175s.

Friends don't let friends shoot 168s at 1000 yards. Unless of course there is a friendly wager at stake.
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