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POI Again

Discussion in 'Shooting Related Threads' started by Hotrod67, Oct 30, 2012.

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  1. Hotrod67

    Hotrod67 Member

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    Jun 28, 2012
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    I've read on this forum that raising the rib at the muzzle will change POI. Which way, hi or low?. What about a rib that is taller at the breech and tappers down to nothing at the muzzle, where is POI now?. Would it be the same as if you didn't add the rib?. Thanks in advance. Dan Smith.
     
  2. bluskyshooter

    bluskyshooter Active Member

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    Aug 13, 2010
    Messages:
    576
    Dan,
    LOW. Take the time to draw this out on paper - and you will have a better understanding of what is going on. Take a piece of paper, pencil, and ruler. Draw the gun with front sight and your eye as the rear sight .... and a target out in front. Connect all three objects with a straight line from your ruler. Now, draw a new front bead a little higher than the original (raising the rib). Keeping the eye at the same point - now draw a straight line connecting the eye and new front bead. You will see the line goes over the original target. Meaning, in order to "aim" the bead on the target you will have to lower the barrel. Thus, your gun will now be shooting "lower" than it did before.
     
  3. Krieghoff100

    Krieghoff100 Member

    Joined:
    Nov 5, 2011
    Messages:
    138
    Easiest way to remember sight adjustments for all firearms is acronym FORS - Front Opposite Rear Same. Move the front sight up, POI goes down. Rear sight (your eye) up, POI goes up. Raise your eye (comb) and lower the front sight to achieve highest POI.

    Best way to determine current POI is to go to pattern board

    Hope this helps!
     
  4. Twinbirds

    Twinbirds TS Member

    Joined:
    Jan 29, 1998
    Messages:
    1,144
    best way to set poi is on the sidewalk shooting straight a ways.
     
  5. Rollin Oswald

    Rollin Oswald Active Member

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    Jan 29, 1998
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    Location:
    Brillion, WI
    Dan,

    Send me an email at the address above and I will reply with an automatic POI calculator attached. It is a page that cqan be opened if you have Excel software (part of Microsoft Office) and automatically does the equations associated with calculating how much raising the comb (or lowering the front bead) will change your gun's POI.

    Just put "POI calculator" in the subject line of the email.

    Rollin
     
  6. senior smoke

    senior smoke Well-Known Member

    Joined:
    Sep 30, 2007
    Messages:
    7,565
    Location:
    Wauwatosa Wisconsin
    Vic Reinders showed me his method of patterning a gun when a pattern board was unavailable to him. He would place an empty soda can around 20 yards in front of him on the grass. He would then shoot at the can. If the gun shot low, you see a bunch of grass removed in front of the can. If the gun shot high, the grass is removed behind the can. If it's dead on, you hit the can. It also works if the gun shoots to the left and to the right.

    Vic felt that you have to know where your gun shoots in order break consistant good scores. He also felt that you need to marry your gun as it takes a long time to really know where it shoots.
    Steve Balistreri
     
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