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If I zero my red dot scope at 25 yards

Discussion in 'Rimfire Forum' started by Never Nervous, Apr 8, 2010.

  1. Never Nervous

    Never Nervous

    2,777
    67
    Aug 18, 2009
    Metro ATL
    where will the bullet hit the target assuming the bullet goes to point of aim.
    Trying to sight in a red dot scope on the Sig 522 with a boresighter.

    Thanks

    NN
     
    Last edited: Apr 8, 2010
  2. Davegrave

    Davegrave Dapper Dan

    4,170
    1
    Sep 1, 2005
    NW IN
    I'm confused by your question. As worded....it will hit right where you're aiming it if as you say, it's zeroed in and the bullet hits the point of aim.
     


  3. Never Nervous

    Never Nervous

    2,777
    67
    Aug 18, 2009
    Metro ATL
    My bad. I mean where will it hit at 100 yards?
     
  4. volsbear

    volsbear IWannaBeSedated Lifetime Member

    11,457
    43
    Nov 8, 2007
    Illinois
    That should depend on the rifle and ammunition.
     
  5. Never Nervous

    Never Nervous

    2,777
    67
    Aug 18, 2009
    Metro ATL
    I have the Winchester 333 that I will use. I will also use CCI but haven't decided what kind.
     
  6. Here is a ballistics calculator.

    http://www.handloads.com/calc/

    IF you don't know the BC of the bullet you are shooting over on the left hand side is a BC estimator.

    I used 1,200 fps for the velocity and the BC estimator with the round nose bullet selection.

    With the red dot mounted 2.5" over the center of the bore if you sight dead on a 25 yards you will be 3.77" low at 100 yards.

    But that is a lot of guesses on your set up and would need to be verified on the range.
     
  7. RickyD

    RickyD

    96
    6
    Aug 13, 2004
    South Florida
    Vafish,

    that is really neat, I saved that, too. Big thank you!
     
  8. No problem guys.

    It's not mine, just one I found. It's usually the first one that pops up on a google search for "Ballistic Calculator"
     
  9. RickyD

    RickyD

    96
    6
    Aug 13, 2004
    South Florida
    Alright, but thanks for sharing. I never punched the right terms in, it seems.
     
    PzGren likes this.
  10. volsbear

    volsbear IWannaBeSedated Lifetime Member

    11,457
    43
    Nov 8, 2007
    Illinois
  11. GSSF17

    GSSF17 ...2 of 'em

    1,280
    1
    Jan 25, 2009
    Central FL
    Grain of bullet? CCI what? Win 333 is a 36 gr, and a hp at that. Not exactly ideal for reaching out and touching something. Further, a red-dot is not suited for much over 50 yards anyway- at least, with any kind of precision.

    All of these factors will mean at least an inch of difference at 100+ yards.


    Understanding your ammunition, the impact of the environment on your situation, and rifle's capability will help you allow for all the variables that one encounters when making a long(er) whot with a .22 lr.

    Good luck.
     
  12. Never Nervous

    Never Nervous

    2,777
    67
    Aug 18, 2009
    Metro ATL
    I finally went to the range last night to zero the red dot scope on my Sig 522. Started at 15 yards. After a few tries, I got the sight set so the bullets were going almost thru the same hole in the 10 spot as long as I wanted to aim there. Kind of neat but felt like I was wasting bullets. Moved the target back as far as I could (25 yard inside range). Bullets were grouped the same but about 1-1/2 high over the 10 spot. I also noticed that if the dot in the scope is too bright, it will wash the target out making it difficult to see. When I set the dot just barely enough to see it, I could see the target a lot better. Sorry,
    no pictures.

    Oh! I was shooting Winchester 333 and Winchester Super X 40 gr. Super X shot good but lead is dirty.

    Thanks for all of the replies. Big help