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Shooting with a bipod

Discussion in 'Anything Airgun Related' started by andyh, Sep 3, 2008.

  1. andyh

    andyh Engaging Member

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    I used a bipod on my Ultra a while back and found that I couldn't get the groups in the place I was aiming at. Essentially it was shooting high but the groups were fine. By high I mean around 4" at 20 meters. Scope is a Varmint II 4-10mag.
    I've used the same bipod on my ratty and had no problem with the groupings and it shot dead on apart from the occasional flier (co2 guns for you I guess).
    Any ideas why this happens, I can only think it's the short barrel the Ultra has, is this common to carbines ?
     
  2. Leeman

    Leeman Busy Member

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    Are the bipods attached to the barrel or stock on the ultra?
    How is the grouping of the ultra when you take bipods off?
    Really no change should occur on your POI when you have bipods on or off.
     
  3. Rambo

    Rambo Engaging Member

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    I wouldn't think a bipod would cause problems to your grouping. The only thing I've heard about bipods is that when used to shooting without one, the extra weight can put you more off balance on standing & kneeling shots.

    Is 20m your zero range? I know if you are closer than your zero range, you have to hold-under, & aiming at centre would cause the higer groups (If below the zero range) 4" is a bit too high though, even for hold-under.

    Your scope may have been knocked or bumped. Just the other day, I found a 2" shift to the right on my S410.

    I want a bipod though :up:
     
  4. a1gunner

    a1gunner Pro Poster

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    you could be shooting at a new elevation.

    if you go prone you could be shooting up at your target.

    also if you bench rest and have a bipod you could be shooting down on the target.

    say you zero at 90 degrees to the target point of impact will be diferent as you shoot above or below the target.

    could be one answer
     
  5. andyh

    andyh Engaging Member

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    The bipod is "attached" to the barrel, one of them cheap jobs, I know there was nothing wrong with the range I was shooting, where my rifle's zeroed. I'm wondering whether using a barrel mounted tripod puts the poa out and whether a stock mounted tripod would be the answer, or a tripod with adjustable height so you would have the ability to "raise" the gun to fit your prone position better. Maybe the cheapy bipod is just to low and putting my aim point out of synch. I guess it's all about angles with the Ultra.
    The grouping the Ultra produces at 30m (my rifles zero point) is fine, dead on the poa, for a "short" barrel it's very accurate, but as I said to a1 in a pm I'd like to try a longer barrelled rifle like an S400/410 to compare the accuracy of shorter barrel against longer barrel. Unfortunately I spent all my dosh on the Ultra so an S400/410 will have to wait.
    As you all know the .177 produces a flatter trajectory and I can say the Ultra zeroed at 30m gives a trajectory that the zeroed scope can be used dead on between around 20 - 40 meters and I'm well pleased with the .177's capabilities and power. (Sorry a1, but then again I know all about your calibre preferences :D)
     
  6. andyh

    andyh Engaging Member

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    No bumps or nothing the scope was still spot on, zero is 30m, but even with the trajectory taken into account the bipod groups were just way to high consider the Ultra and AA pellets seem to produce a reasonably flat trajectory.
    I think an adjustable height bipod would really be the best choice and to be truthful the answer to my question.
    By the way all I use pellet wise are AAField, thanks for all the advice on the pellet subject which I guess will carry on 'til the end of civilisation. Just as a footnote I tried various brands of pellet and found nothing compares to the AAs' and when I ran out of pellets I tried another brand, what a mistake, for some reason it took a good 40-50 AAs' to get the rifle to settel down again and produce good groups :confused: What's that all about ?
     
  7. Leeman

    Leeman Busy Member

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    Hi andyh

    I am not there so i am guessing here....but is your barrel steady enough to put bipods on it.....i personally do not like attaching anything to my barrels apart from silencers....your gun has also a free floating barrel, just get rid of them bipots i think your barrel is moving when it is sitting on the bipods.

    Also since you do not have enough cash to buy an AAS400, if i was you the cheapest and best way is to add a longer barrel on you BSA....BSA have great barrels and i am sure you can pick one for around £100 ready to be dropped into you BSA.
    Just an idea, which i have done many times my self.
     
  8. andyh

    andyh Engaging Member

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    Point taken Leeman, hadn't thought of a bipod on a free floating barrel, quite simply I don't use the bipod no more and have tried shooting sticks (something like this but I only paid around £25 for mine, these look like what I bought and I would recommend them https://secure.blackwolfsupplies.com/cgi-bin/shop/HP-2.html) for long range just to give me a bit of extra stability. No problems there m8, deadly accurate, shooting buttercups at around 40meters, they just disappear in a puff of errrm, buttercup dust I suppose, dandelions go well too and wind fall fruit, as do soggy wet thick bread rolls. Just an expensive way of weeding the garden but more fun than conventional methods. :D
     
    Last edited: Sep 4, 2008
  9. i8allthepies

    i8allthepies Posting Addict

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    Andy,
    For my two pennorth, I'm with Leeman. The Ultra has a 10.5" floating barrel, so if the bipod deflects this up by just 0.1 mm at the tip, you'd be about 10 - 12 mm high at 30 yards:up:
    Does the Ultra have a stud where you could fix a harris-type bipod to:confused:
     
  10. a1gunner

    a1gunner Pro Poster

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    ah this is verry much an importance.

    the point of free floating barrels is that they float, free.

    they have no barrel band to suport it.
    they say the free floater is more accurate than the barel clamped ones.
    id thing that the problem is the pod being on the barel;)

    if you can try either buying or borowing a harris style one that fits onto the stock.

    it may show better groupings
     
  11. Leeman

    Leeman Busy Member

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    A1 do not believe everything that you read on the web...it makes no difference in accuracy if it is free floating or not the barrel.

    For example if you look at most of the competion airgun most of the makes, if not all are not free floating....this are roumors that spread on the net and they are false.....you are my young buddy here and i have to keep an eye out , so you learn the right things....your mother and father told me to do this:D:D:D
     
  12. a1gunner

    a1gunner Pro Poster

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    either way i doubt that having a bipod cliped onto a non suported barel is a good thing.
     
    Last edited: Sep 4, 2008
  13. EX Mod Cog

    EX Mod Cog Keyboard Hero

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    I can't imagine it being a good thing?
     
  14. a1gunner

    a1gunner Pro Poster

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    yeap mistake there, long day:rolleyes:
     
  15. andyh

    andyh Engaging Member

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    It does seem the floating barrel is the reason why I didn't get the expected results, as for a stud I don't know and can't have a look see as the rifle's in BSA's workshop, I don't recall one so I could be wrong, thanks for your replies guys, think I've got it sorted now.
     
  16. andyh

    andyh Engaging Member

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    Reckon that's another lesson learnt, ;)
     

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