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Help with 9mm carbine balistics

Discussion in 'Rifle Discussion' started by Lars, May 17, 2015.

  1. Lars

    Lars Clackamas Active Member

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    Well I have a Colt 9mm AR with 16" barrel and Aimpoint PRO on it. For ammo I have a few hundred rounds of Winchester Ranger RA9TA 127grn +P+ that I would like to dedicate for it. Anybody have a ballistics calculator that can find sight in distances?
     
  2. Medic!

    Medic! What just happened? Has eagle eyes. But cant remember what he saw. Bronze Supporter

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    You need to chrono the guns velocity.

    I know my 240 grain 44 magnum rounds go 1350FPS in a 4'' S&W 29.
    And the same rounds are 1850FPS through my Ruger 44 Mag Dearfield!
     
  3. mjbskwim

    mjbskwim Salmon,Idaho Well-Known Member

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    Check Chuck Hawk's sight. He has answers for most ballistic questions
    I found this.Should give you some starting point
    From ,haha,I was gunna say to go here too
    AR15.com
    115gr from 8.5" AR @ 1250 fps, Hornady chart shows 6.3" drop @ 100yd with a 50yd zero, 8" drop with 25yd zero.

    147gr from 8.5" AR @ 950 fps, Hornady chart shows 9.6" drop at 100yd with a 50yd zero, 13" drop with a 25yd zero.
    And the link to a on line calculator
    http://www.biggameinfo.com/?f
     
  4. mjbskwim

    mjbskwim Salmon,Idaho Well-Known Member

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    SO on AR15 some are saying 25 yards and some 50.
    http://www.ar15.com/archive/topic.html?b=3&f=15&t=465858
    If'n it was me,I would shoot the thing at 50 and 100 yards and see what your POA to POI is. I have shot 9s out to 100 yards with a hand gun and the drop ain't that much.Like medic said check your gun,YMMV
    They also talk about the effective range of the caliber. Is it for self defense or competition?
    For self defense,I would sight it in at 25-30 yards ,cause that would get you where you want to be .
    For competition,you would sight it in for the medium range you will be shooting
     
  5. rick benjamin

    rick benjamin USA, Or, Damascus Secure the drama Silver Supporter 2016 Volunteer

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    RA9TA from a 4 inch barrel was chronographed 1250 fps at the muzzle.
    Ballistics by the inch 9mm Luger chart
    124 gr 9mm bullets exit from a 16 inch barrel 187fps faster = 1437 fps

    Gundata Trajectory calculator provides chart and explanation.
    Using the calculator, and 1437 fps, and a 100 yd zero, bullet drops 50 inches at 250 yards.

    This is a SWAG, maybe close.
    9mm 124gr sd.149 1437fps.JPG



    9mm 124gr sd.149 1437fps.JPG
     
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  6. Page.k

    Page.k Seattle Active Member

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  7. Lars

    Lars Clackamas Active Member

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    Thanks for the help so far. I need to get to the range with someone that has a chronograph I guess. I'm wondering what a 50' zero would do for me? That's what the local indoor range is.
     
  8. mjbskwim

    mjbskwim Salmon,Idaho Well-Known Member

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    I checked out the ballistics of the 10mm but there ain't no good carbine for it.
    And 16 rounds out of my g20 is a lot of fire power. It will hit MOB (minute of bad guy) easily at 150 yards.
    Yes I have tested it and done it:cool:
     
  9. Page.k

    Page.k Seattle Active Member

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    I think for you Mjbskwin one of the large frame AR/Glock lowers will better option. You can use the same mags between the G20 and the AR buy the down side is the cost of the lower. I use modified Grease Gun mags and if I had to do a second AR in 10mm I'll go with 45ACP Uzi mags that costs more than the current mags I'm using.

    So the the OP why not start at 50 yards and work your way out? I think getting to 100 yards with good grouping should be the goal. Also do you have access to a wooded area that you can use one of the bouncing targets? To me they make a great learning tool.
     
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  10. mjbskwim

    mjbskwim Salmon,Idaho Well-Known Member

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    You are speaking of mech tech I presume?
    I would like to try it out I just never get impressed enough to shell out the $500
     
  11. Page.k

    Page.k Seattle Active Member

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  12. Page.k

    Page.k Seattle Active Member

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    For a good learning target you may like to look at getting a "Reactive Target" for training. Know what the drop should be will help but putting rounds down range at different ranges to me is even better.



    And for 22lr
     
  13. mjbskwim

    mjbskwim Salmon,Idaho Well-Known Member

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    Now if someone would make a 30rnd mag for 10mm.The 45 is out there but needs new follower and feed lips
    Thanks for the links