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Thread: 308 balistics

  1. #1

    308 balistics

    I will start reloading the coming week. Will start with 243 win and Ramshot Hunter powder. When scrolling through the Ramshot data, I noticed that the announced muzzle velocity of a 308 with 130 grain bullets is almost the same as the 30-06 with the same bullet. Up to 150 grain there 's almost no diffrence. Are these optimistic data or is this real?

  2. #2
    SD Regular Greener Jim's Avatar
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    From experience with load data of many manufacturers, but no first hand experience with either 308 or 30-06, I would say that that is a true statement.
    30-06 does better with the heavy stuff.
    That been said, with the correct powder and a .308 chambered to accommodate it, the difference between the two is negligible even with the heavy stuff.

  3. #3
    Quote Originally Posted by Greener Jim View Post
    From experience with load data of many manufacturers, but no first hand experience with either 308 or 30-06, I would say that that is a true statement.
    30-06 does better with the heavy stuff.
    That been said, with the correct powder and a .308 chambered to accommodate it, the difference between the two is negligible even with the heavy stuff.
    Some people would argue with you about that. (Look at the 280 vs 7mm Rem Mag debates) I've shot both for decades and have never had a difficulty exceeding 308 velocities with the 30-06 in like guns with identical bullets. The difference isn't anything the game would notice: from 100 to 200 fps. The biggest difference is that the 30-06 is throated to accomodate the heaviest bullets. The 308, generally, is not.~Muir

  4. #4
    Just as new powders move the MV of the .308 up another 150 fps, so too do they move up the MV of the .30-06 up 150 fps.

    The real world question is, "What is the velocity of the ACCURATE loads?"
    An extra 200 fps is no good for long range if it opens up the groups by 1/2 MOA at 300 or 400 yards.
    At 100 and 200 yards, the extra MV doesn't matter.

    And 200 fps is significant with heavy ( 180 grains and more ) bullets, because they retain speed more than lighter bullets, and 200 fps at 300 yards is like being at 200 yards in terms of energy. Marksmanship can adjust to hit at 400 and 500 yards with a .303 Enfield or .257 Roberts, or .308 Win, but you cannot create more energy. That is why the paper ballistics and armchair debates don't count as much as shooting a 180-gr bullet from a .308 Win, a .30-06 or .300 H&H or .300 WM, and seeing that the difference is real.

  5. #5
    60-70ft/lbs , not worth it in my opinion , rifle fit/weight and ammo availability are more important questions.

    if your after more power at range , get a winmag and make the long action worthwhile.
    Right where's those stones , I'll start !

  6. #6
    SD Regular Greener Jim's Avatar
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    I agree that at longer range it can make the world of difference IF accuracy is the same or close.
    But on game, at normal ranges, nowt in it. If I didn't already have a deer rifle I'd get a 30-06, simply as it is slightly different to the legions of 308 users! Even if 30-06 is hardly rare or unloved!

  7. #7
    Inside 200 yards, the .308, .30-06, .270, 8x57 Mauser and 7x64 are all more than you need for any deer. The 7x64, 8x60, and .30-06 can, with the right bullets, deliver 300 to 400 more ft-lbs of energy at 300 yards, and shoot very flat in doing so, with more wind resistance.

    Having to break bones and penetrate lots of hide, fat and muscle, as on a bear or boar, elk or moose, is when you need a heavier bullet arriving at over 2,000 fps. But hunting is all about getting closer, anyway.
    Last edited by Southern; 28-09-2014 at 13:06.

  8. #8
    SD Regular Greener Jim's Avatar
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    Couldn't agree more with that. Most quarry in most environments 200 yards is the normal max. Hills and mountains are different.
    I'm a firm believer in fieldcraft and getting close. Yeah you'll be frustrated when that stag bolts off just as you get into range but when it works it's the best feeling out there

  9. #9
    Quote Originally Posted by Southern View Post
    Inside 200 yards, the .308, .30-06, .270, 8x57 Mauser and 7x64 are all more than you need for any deer. The 7x64, 8x60, and .30-06 can, with the right bullets, deliver 300 to 400 more ft-lbs of energy at 300 yards, and shoot very flat in doing so, with more wind resistance.

    Having to break bones and penetrate lots of hide, fat and muscle, as on a bear or boar, elk or moose, is when you need a heavier bullet arriving at over 2,000 fps. But hunting is all about getting closer, anyway.
    i'm sorry but I have to call this , show me any load in 30-06 that has 3-400ft/lbs more than an equivalent 308 load at 300yds and I'll donate 100 to a charity of your choice !
    Right where's those stones , I'll start !

  10. #10
    When the 06 was making its name it had velocities lower than the 308 (using modern powders). Where the 06 can now be loaded to close to 300 win mag. The difference in velocity between the modern 06 and 308 loads i would consider negligible, as the useful hunting range is largely unchanged.

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