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Thread: Long range advice

  1. #1
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    Long range advice

    Question for those of you with long range experience, I had twenty minutes free time today which coincided with near windless conditions and finally got to have a shot at a 100 yrd biscuit tin which I'd set up a month ago. I fired 15 shots and never missed it which made me happy, when I had a closer look most of the pellets struck within a two and a half inch vertical strip but were evenly strung out over the eighteen inch height of the rectangular tin. So do I ...

    A. Weigh my pellets and group according to weight.
    B, Head size my pellets .
    C. Do both of above.
    D. Just be happy to be hitting the tin.

    I'm using a HW77 SE ( which has never been touched) in .177 firing 10.3g Airarms field heavies at 10.4 ft/lbs

  2. #2
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    Well thanks for pondering it anyways, it has me stumped too

  3. #3
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    What is your set up?

  4. #4
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    Quote Originally Posted by Retnuhtibbar View Post
    Well thanks for pondering it anyways, it has me stumped too
    Perhaps it was the thought of a 100yd biscuit tin lid. that's a huge tin of biscuits!

    Never tried 100 yards but I would have thought that there were so many variables - particularly with a springer, and including the way you hold the rifle, slight cant etc, that (for a decent pellet like the JSB Exacts) any tiny variations in pellet weight would have an insignificant effect on the end result.

    Perhaps the question might be "what would you be happy with" at that distance? I don't know, but for me an inch spread at 50m off a bag on a calm day with a normal PCP and pellets straight out of the tin would be good, based on what I get with my FAC Rapid. That would probably equate to over two inches at 100 yards. I would be very satisfied with what you've achieved with the HW, but then I'm easily pleased
    Last edited by severnsider; 24-12-2020 at 07:43 AM.

  5. #5
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    Just so I understood correctly, a vertical spread of 18Ē, with a 2.5Ē horizontal. If that is correct then itís called vertical stringing, usually related to variable velocity of shots or aim.

    You need to run your chosen pellets out of your gun over a chrono. The extreme spread (ES) & thus standard deviation (SD) need to be small like <10fps ES, then the vertical string will be small. The smaller the ES/SD number the better. Weighing pellets should help get the best numbers here.

    The other critical thing is the repeatability of the aiming mark & your ability to hold steady & repeat it. A springer requires a complete break of hold & movement of the gun to cock & load, so repeatability is difficult. Thatís one reason a PCP off a bench with bags etc is more repeatable, no movement of the gun &in hold reloading.

    Start with the chrono, if good numbers, then make sure you have an aiming point that can be centred on your scope.
    Ah the Toys ;-
    Tommygun .22LR, Ruger 10/22, Erma M1 .22WMR, Rossi 92 .357Magnum, Tikka T3 Tactical .308Win,
    1858 & 1873 BPR's, Browning Gold 12G, Winchester 9410, Air Rifles, Crossbows & Longbow.

  6. #6
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    At 100yds with the results you achieved I'd be assuming there was little or no variation in cross winds. However a variation in fore and aft wind would quite possibly have had an effect on the vertical disposition.
    The weight variaition in the pellets may also have had an effect as you have suggested. How much variation is there in the fpe your rifle produces between shots and is it a springer or pcp?
    So many factors; if it was me I'd just enjoy the results achieved and have another bash.
    Jim
    ps Which biscuits come in an 18" tin?

  7. #7
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    I agree that we probably need to be realistic with our expectations. Hard to expect a half inch group out at 50m+ unless you have some beast of a gun!

    Just out of interest, have you tried 177 and 22 out at that range? Iíd be interested to see if thereís a significant difference.

  8. #8
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    I'd be very happy to consistently hit the tin!

    For the grouping then surely weight matching the pellets would help as even the slightest of weight difference would have a significant altering of the arc over that distance?

  9. #9
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    Back in the day when I was a complete air rifle anorak, I did some testing with using pellet lube and found it improved velocity consistency shot-to-shot, but only when an absolutely tiny amount of oil was applied.

    The best method I found was to put two drops of lube into a ziploc bag, spread it all around the inside, then add a tin of pellets and gently move them around for a few minutes. Most of the two drops was left in the bag.

  10. #10
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    Thanks for all the replies, haven't got back at this since. Hope conditions are calm over the Xmas holidays and I'll be back at it. I've fitted a V-mach kit since, but also I have developed a cataract in my right eye .....not bad enough to be removed yet under the public system but annoying when pushing the limits target shooting. I wear glasses for reading but don't need them for anything else. I could get driving glasses but I don't need them....for driving but am wondering if they would help when looking through the scope. I was trying empty .22 rimfire cases last weekend but couldn't focus on them. I used to love the sound they made spinning away.

  11. #11
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    Quote Originally Posted by Retnuhtibbar View Post
    ...
    I was trying empty .22 rimfire cases last weekend but couldn't focus on them. I used to love the sound they made spinning away.
    I used to enjoy shredding an empty fag packet offhand at 100 yards with ten rounds of 303, but I really think .22 empties are a bit challenging at that range.

    Try to find something of a size between those and the biscuit tin...
    ...history... is, indeed, little more than the register of the crimes, follies, and misfortunes of mankind. (Edward Gibbon: Decline and Fall of the Roman Empire)

  12. #12
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    Quote Originally Posted by MikB View Post
    I used to enjoy shredding an empty fag packet offhand at 100 yards with ten rounds of 303, but I really think .22 empties are a bit challenging at that range.

    Try to find something of a size between those and the biscuit tin...
    Sorry....should have clarified the 22 shells were at 30 yrds

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