7mm08 vs .308

Discussion in 'The Basics, Starting Out' started by foreign, Aug 7, 2008.

  1. foreign

    foreign Well-Known Member

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    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
     
  2. remingtonman_25_06

    remingtonman_25_06 Well-Known Member

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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...
     

  3. WildcatB

    WildcatB Well-Known Member

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    ??? 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...
     
  4. remingtonman_25_06

    remingtonman_25_06 Well-Known Member

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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...
     
  5. AJ Peacock

    AJ Peacock Well-Known Member

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    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
     
    Last edited: Aug 8, 2008
  6. WildcatB

    WildcatB Well-Known Member

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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
     
  7. Buffalobob

    Buffalobob Writers Guild

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    That's why people only show up once with 168s. After that they bring 175s. :D

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

    eddybo Well-Known Member

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    Funny but very true:)

     
  9. specweldtom

    specweldtom Well-Known Member

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    At 600 yds, on targets, it's a toss-up for me. At 800 yds, also on targets, I would prefer the 7-08 humped up with a 162-168 gr high B/C bullet.

    For hunting beyond 400 yds, I wouldn't use either one. I would use a big .30 pushing 200-220 gr bullets around 3000 fps.

    Just my opinion (see my signature).

    Good hunting, Tom
     
  10. IChaseCoues

    IChaseCoues Well-Known Member

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    I haven't run the 168 Bergers through my 7-08 yet, but it will easily run 2715 with the 162 A-max.

    If it will push 2675 with the Berger it won't really gain anything over the A-max.

    Just what I've seen so far.

    I picked the 7-08 over the 308 because I was hunting smaller animals that didn't need that much thump up close, that's what the 7WSM and 180 Bergers are for!

    The 7-08 has been overlooked too long in my opinion. It's a great mid range, mid size animal hunting round.
     
  11. foreign

    foreign Well-Known Member

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    hey mate what load do u run that has that much energy at 800. i consider around 1000ft/lbs around as low as i want to go for killing deer sized animals. i run 45.6grs adi 2208 behind a 150 grain hornady bysp. would like more energy than that.
     
  12. foreign

    foreign Well-Known Member

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    so is there any load and distance where the .308 isw better. starting to wonder if i should have got a 7mm instead of a 308.i want to have around 1000ft/lbs at the longest distance possible for hunting
     
  13. WildcatB

    WildcatB Well-Known Member

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    I use 45 grains of reloader 15 with 168 grain a-max's. I'm also at 5000ft elevation which helps with downrange energy.

    Here's a link to some other loads:
    .308 Winchester Cartridge Guide

    Some people are getting 2760 MV with 175 grain SMK's. If you want more energy for long range, it sounds like you should look at the 175 grain Berger VLD's with their BC of .528. Also, if you can get some reloader 17, you might be able to go even faster.
     
  14. WildcatB

    WildcatB Well-Known Member

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    With the velocities listed on ACCURATERELOADING.COM the 7mm-08 does better all around.

    In general, 7mm bullets have higher BC's for a given weight. But if you look at what reloader 17 is doing with heavier bullets, as listed on 6mmbr, you can narrow the difference between energies long range. Here's the link: Alliant Reloder 17