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O/U top or bottom?

Discussion in 'Uncategorized Threads' started by hawk57, Apr 5, 2007.

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  1. hawk57

    hawk57 TS Member

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    Can someone tell me the benefit of shooting one barrel over the other on a O/U for singles?


    Hawk,
     
  2. lumper

    lumper TS Member

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    They say there is less felt recoil from the lower barrel.
     
  3. timb99

    timb99 Well-Known Member

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    Not much, unless:

    There is a significant difference in POI between the two barrels, and/or

    Some folks believe shooting the lower barrel reduces perceived recoil and barrel jump (and therefore stock movement into yoru face) due to the fact that the bottom barrel is more lined up with your shoulder.

    I shoot with many folks who shoot the top barrel for singles and handicap, and can't tell the difference.

    Both my barrels shoot pretty much the same POI. I just shoot the bottom barrel because I like to, and it has ever so slightly lighter trigger pull weight.
     
  4. Rollin Oswald

    Rollin Oswald Active Member

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    Timb99,

    It is the vertical distance between the barrel fired and the heel of the stock that accounts for the difference in barrel rise in the two barrels. The lower barrel is more in-line with the bore and results in reduced barrel rise.

    Other factors can also affect perceived or actual barrel rise during recoil. The most important is the drop at the heel dimension - how crooked the stock is. If you look at stocks made several hundred years ago for shooters wearing high, stiff, collars, you can see drops at the heel approaching four inches. The stocks had to be crooked since shooters could not lean their necks forward to place their cheeks on the combs. It was with improvements in gun design and heavier loads that prompted drops at the heel to be reduced and shooting apparel to be redesigned.

    Rollin
     
  5. Quack Shot

    Quack Shot Active Member

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    It could make a difference if the gun has fixed chokes. One of my O/U's has an IM in the lower barrel that patterns well for singles and mid caps. The POI is also a bit higher than the top barrel. The top barrel has a very tight choke with a very dense pattern center, which I don't find desirable for singles, along with the lower POI. If you gun has fixed chokes, you would need to determine which barrel is best by some patterning and experimentation.
     
  6. Pocatello

    Pocatello Active Member

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    One of my 682s has a nonselective trigger - bottom always first. It is a definite disadvantage to try to shoot the top barrel for singles and handicap.
     
  7. timb99

    timb99 Well-Known Member

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    Rollin,

    I understand the why's (longer moment arm from the center of rotation on the top barrel), I'm just saying some folks can't tell a perceived difference, and with my gun, that is the case.

    Tim
     
  8. BDodd

    BDodd TS Member

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    In a nutshell, if you have different chokes in the barrels, then one may be preferred for singles while the other for handicap. Then, the mantra is that there is less felt recoil in the lower barrel than the top but I've never been to feel any remarkable difference....breakemall....Bob Dodd
     
  9. Neil Winston

    Neil Winston Well-Known Member

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    My Perazzis kick more on the under-barrel, not the over-barrel.


    Neil
     
  10. oldcop

    oldcop Member

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    Feb 17, 2007
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    Here is another theory I have heard proposed...since the bottom barrel is closer to the hinge and more in a straight line with the gun axis, there is less pressure put on the locking lugs than if the top barrel is shot extensively...take it for what it's worth.

    Jim
     
  11. phirel

    phirel TS Member

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    Shooting the lower barrel first is the traditional firring order. This tradition may be based on a slight difference in barrel rise but this difference may not be consistent with every shooter and every gun.

    Neil stated above that he feels more recoil from the bottom barrel than the top. This might be due to the characteristics of his gun, his characteristics or a combination of both.

    I shoot the bottom barrel first in doubles because when I put on my un-single barrel, I must shoot only the bottom barrel. If I changed the firing order for doubles I would not remember to change it back for singles and would get many more failures to fire.

    Pat Ireland
     
  12. Big Az Al

    Big Az Al Well-Known Member

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    My personnel habit and mental need is that I shoot a tight pattern, mentally when I have tried to shoot the more open lower barrel I loose more birds by being careless, when I shoot the tighter over barrel I tend to concentrate more!

    I can not perceive any differrence between top and bottom in recoil!

    Al
     
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