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Long range rifle build.

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  #8  
Unread 01-26-2011, 02:10 PM
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Join Date: Dec 2010
Location: Denton, Nebraska
Posts: 41
Re: Long range rifle build.

Quote:
Originally Posted by Camshaft View Post
.284-7mm same bullet. Different designation.

I guess i was talking 7mm rem mag vs. .284 rem
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  •   #9  
    Unread 01-26-2011, 02:13 PM
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    Join Date: Dec 2010
    Location: Denton, Nebraska
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    Re: Long range rifle build.

    Quote:
    Originally Posted by strombeckj View Post
    +1 on the Krieger barrel, although most are good. I would look at one of the big 6’s shooting a berger 88gr varmint/match for yotes & PD’s and the 115gr VLD’s for the others. Then I would move up to a 25-06 AI. A 6.5mm and a 7mm really aren’t a “varmint round” although a new rifle in a new cal. Is always a good choice in my book.

    I had also thought of going with a 6mm of some sort, ppc or remington BR. But 7mm is going to have more knockdown power, especially at longer ranges.
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      #10  
    Unread 01-26-2011, 03:23 PM
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    Join Date: Nov 2010
    Location: Colorado, Front Range
    Posts: 561
    Re: Long range rifle build.

    The 7mm has more knock down power for sure. But how much do you really need. look at the info below. may shock you a little bit. (both rounds are putting out over 1000 ft lbs of energy @ 800 yards) the 6mm will have a little more drop at 800 yards but with the higher BC it will deflect the wind better, IMHO I have a easier time correcting for drop then I do drift. Now I would not take a shot on any deer sized game past 300 yards with either if a good broad side shot was not present. However the 7mm with even heavier bullets will close the error factor with poor shot placement. the only reason I bring this up is because you mentioned VARMINTS in your game for hunting. I believe a 7mm is to much for PD's and yotes but perfect for deer sized game. Again this is just my 2 cents worth.... in any case it sounds like your on your way to creating a shooter!

    Sorry this has carried over the way it did.

    115gr VLD @ 3300 fps...example 6-06 AI
    115 gr., .546 B.C.


    Range (yards)
    Muzzle
    100
    200
    300
    400
    500
    600
    700
    800
    900
    1000
    Velocity (fps)
    3300
    3113
    2934
    2763
    2598
    2438
    2285
    2136
    1994
    1857
    1727
    Energy (ft.-lb.)
    2781
    2475
    2199
    1949
    1723
    1518
    1333
    1165
    1015
    881
    761
    Trajectory (200 yd. zero)
    -1.5
    1.0
    0.0
    -5.1
    -14.7
    -29.4
    -49.9
    -77.2
    -112.0
    -155.7
    -209.4
    Wind Drift (inches)
    0.0
    0.4
    1.9
    4.4
    8.0
    13.0
    19.3
    27.2
    36.8
    48.2
    61.7
    Come Up in MOA
    -1.5
    -1.0
    0.0
    1.6
    3.5
    5.6
    7.9
    10.5
    13.4
    16.5
    20.0
    Wind Drift (moa)
    0.00
    0.42
    0.89
    1.39
    1.92
    2.48
    3.07
    3.71
    4.39
    5.12
    5.9

    140gr VLD @ 3400 fps...example 7mm RUM


    140 gr., .510 B.C.
    www.hornady.com
    Range (yards)
    Muzzle
    100
    200
    300
    400
    500
    600
    700
    800
    900
    1000
    Velocity (fps)
    3400
    3196
    3001
    2815
    2636
    2464
    2299
    2140
    1987
    1841
    1703
    Energy (ft.-lb.)
    3593
    3175
    2799
    2462
    2160
    1887
    1643
    1423
    1227
    1054
    901
    Trajectory (200 yd. zero)
    -1.5
    0.9
    0.0
    -4.8
    -14.0
    -28.1
    -47.9
    -74.4
    -108.5
    -151.3
    -204.5
    Wind Drift (inches)
    0.0
    0.5
    1.9
    4.5
    8.4
    13.5
    20.1
    28.4
    38.5
    50.5
    64.9
    Come Up in MOA
    -1.5
    -0.9
    0.0
    1.5
    3.3
    5.4
    7.6
    10.2
    12.9
    16.1
    19.5
    Wind Drift (moa)
    0.00
    0.43
    0.92
    1.45
    1.99
    2.58
    3.20
    3.87
    4.59
    5.36
    6.19



    Last edited by strombeckj; 01-26-2011 at 03:28 PM.
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      #11  
    Unread 01-26-2011, 03:37 PM
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    Join Date: Dec 2010
    Location: Denton, Nebraska
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    Re: Long range rifle build.

    Thanks for the info, I found the Hornaday Ballistic chart a while back pretty helpful. varmint wise, this will be secondary to my .223, probably just for the LONG shots.
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      #12  
    Unread 01-26-2011, 10:43 PM
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    Join Date: Feb 2006
    Location: az
    Posts: 3,207
    Re: Long range rifle build.

    Quote:
    Originally Posted by jthod View Post
    I guess i was talking 7mm rem mag vs. .284 rem
    there is a 284 win and a 280 rem . f for what you are talking about a 6.5-284 would be great.
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      #13  
    Unread 01-27-2011, 03:18 PM
    Junior Member
     
    Join Date: Jan 2011
    Location: Eugene, Oregon
    Posts: 3
    Re: Long range rifle build.

    maybe look at the 280 ackley improved, I have no personal experience, but from what I have seen it performs nearly as well as the 7mm rem mag.
    Another to look at is the 6mm ackley, I just got mine put together, havn't shot it much, but am excited to see how it works with 75 grain pills
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      #14  
    Unread 01-27-2011, 03:58 PM
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    Join Date: Dec 2010
    Location: Denton, Nebraska
    Posts: 41
    Re: Long range rifle build.

    another concern I have is of barrel life, and from reading, the 6.5-284 typically lasts 1000-1200.

    7mm also has a better selection of bullets, brass, and such.
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