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Raise Comb How Much?

Discussion in 'Shooting Related Threads' started by WNCRob, Oct 14, 2010.

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  1. WNCRob

    WNCRob Member

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    Assuming no change in shot velocity(1165fps)how much should the comb be raised @ 21-22 yard line? @ 27 yard line? I presume the POI should remain constant at differing yardages?

    Thanks!

    WNCRob
     
  2. larrycrismond

    larrycrismond Member

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    I agree that 16yd and handicap POI should be the same. Whatever height you add to the comb you should multiply by 32 - for example 1/8 inch added to the comb height will add 4 inches to your POI at 40 yards.
     
  3. hmb

    hmb Well-Known Member

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    Figure out what affect gravity has on your shot pattern and they you will know how much to raise your comb. HMB
     
  4. WNCRob

    WNCRob Member

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    My seat of the pants math would indicate raising the comb 1/16th at 21-22 yards and 1/8th at 27 yards, plus an allowance for the effects of gravity. I'm sure some physics/ballistics expert has this figured out more precisely.

    WNCRob
     
  5. dverna

    dverna Active Member

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    I wish I could point the darn thing well enough to see the affect of a 1/16" comb change. We get too "cute" with stuff like this.

    I just smile when I see an excellent shot who is ink-balling 20/25 move their comb by a 1/16" after missing a bird. Like that is going to matter?

    A HOF shooter told me a 1/4" rib adjustment on a K-80 would move the pattern 4 feet. My rudimentary trigonometry skills could not prove this assertion.

    Don Verna
     
  6. dimapower

    dimapower Member

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    POI is an important variable here. In general, high shooting gun requires little to no comb adjustment whereas a flat shooting gun would require adjustment all other factors considered equal. My gun shoots 100% high and find no comb adjustment required and my sight picture is fairly consistent on straight aways 16 - 27 yards
     
  7. BigM-Perazzi

    BigM-Perazzi Well-Known Member

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    I have none between 16 and 27. I hold a high gun.
     
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how much to raise the comb to gain 3 inchs