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Thread: Weihrauch HW100

  1. #1
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    Default Weihrauch HW100

    Just bought a new HW100 Laminate.

    The barrel is very long at 600mm. I really wanted the carbine version but no one in South Africa does it.

    I have heard of guys shortening the barrel.

    Has anyone done this? I know it will affect long range accuracy.

    Attached is the various barrel lengths depending on type and power.
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  2. #2
    REP: Hill Air Rifle Pumps
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    Speak to jacowp on the forum , he is the owner of airgunworx. He is a hw100 guru.
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  3. #3
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    "Shot"
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  4. #4
    Protea Benchrest (Air) Team '15/'17

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    Rather buy a short barrel or any other 16mm OD barrel that you can find and machine it down to the length you require - and keep your original barrel standard. Then you can set up the rifle back to factory standard the day you want to sell it.

    Maybe someone does have a carbine HW100 barrel that he want to sell to you. The it is an easy change you can do yourself.
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  5. #5
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    Unless you are shooting with open or "iron" sights, shortening the barrel shouldn't affect accuracy negatively. The shorter barrel-time may even be a good thing, as it reduces the effect of barrel movement during the shot cycle.

    Muzzle velocity, on the other hand, will suffer. Leading to longer pellet flight time and increasing wind drift. Easily cured by just increasing the mv again.
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  6. #6
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    There is a hw100 barrel in 5mm for sale on the forum
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  7. #7
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    Quote Originally Posted by Air Wolf View Post
    Speak to jacowp on the forum , he is the owner of airgunworx. He is a hw100 guru.
    I use Kevin of Airvolution for this type of work.
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  8. #8
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    Quote Originally Posted by Juniork View Post
    Rather buy a short barrel or any other 16mm OD barrel that you can find and machine it down to the length you require - and keep your original barrel standard. Then you can set up the rifle back to factory standard the day you want to sell it.

    Maybe someone does have a carbine HW100 barrel that he want to sell to you. The it is an easy change you can do yourself.

    I plan to buy the Carbine 410mm barrel in the UK and swop it out with mine. I am in the UK next month.
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  9. #9
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    If this is a 4.5 version, these things are AMAZING as a stumpie... with a 310 barrel.

    You will, however, need a carbine tube.
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  10. #10
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    I am so glad that I have an HW100S with both standard and carbine barrels, with both the carbine and standard air cylinders in quick fill. . thanks Mr Twilly
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  11. #11
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    I received my rifle yesterday. Fitted a SIG SAUER 3-9 x 40 scope that I was using on my Krico 0.22 Rimfire.

    Took 4 shots to get the scope sighted. Very accurate after a reduction in power.

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  12. #12
    Protea Benchrest (Air) Team '15/'17

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    The full power 4,5mm version is set up at 22fpe and shoot Heavies @ about 960fps very accurate - 13 to 20mm groups at 50m.
    Monsters is the best pellet to shoot at 22fpe.
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  13. #13
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    Thanks for the advice. Buying high quality pellets in Nelspruit is a challenge!
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  14. #14
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    As I move target further away, I need more right windage correction. ie. POI moves left as I move target further away.

    Is this a scope alignment issue, pellet issue or barrel alignment issue?
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  15. #15
    Springer FT World Champion '09
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    Quote Originally Posted by Rotorbug View Post
    As I move target further away, I need more right windage correction. ie. POI moves left as I move target further away.

    Is this a scope alignment issue, pellet issue or barrel alignment issue?
    Firstly, considering that the HW100 is one of the finest-engineered products on the planet, it is unlikely to be a barrel alignment problem, IMO.


    Try and zero the windage of scope at the furthest distance, and then shoot some groups while coming closer. If you zero the scope at, say 25m - it does not necessarily translate to zero at 50m, while windage zero at 50 would enhance accuracy at 25.

    Also, swap out the scope and see if the issue is resolved

    If this fails, then there may be a severe mechanical/engineering (manufacturing?) alignment issue with the mounts or scope rail. Crossover, IMO, is a negligible factor in standard range air rifle shooting.

    Anyone disagree with me?

    PS... it might also actually be WIND!
    Last edited by Bludlust; 14-05-18 at 17:09.
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