Airgun Accuracy

Only accurate airguns are interesting!


” Only accurate rifles are interesting” *

This blog is dedicated to my voyages into airrifle accuracy. To share my experiences in the hunt for accuracy from myself and from my rifles. And to give other shooters the chance to improve their shooting and their equipment based on my experiences.

It will focus on pre-charged pneumatic airrifles for Field Target, Hunter Field Target and 50 and 100 meter airgun precision shooting. The first project and reason to start this blog is the conversion of a Walther LG400 airrifle from 7,5 to 16 Joule.

Hope you all enjoy reading this and suggestions are welcome,

Kind regards,

Sven from The Netherlands.

My field target club is: Field Target Schalkhaar

FT logo FT Schalkhaar_3
Field Target range at FT Schalkhaar
Field Target range at FT Schalkhaar

60 thoughts on “About

  1. Hoi Sven,

    Wat een leuke blog! En zéér interessant om te lezen.

    Hartelijke groeten, Joost J. (Die je wel kent van HFT/FT)

  2. Hey Sven, nog nooit geweten dat je blogde, maar leuk je blog te lezen!

  3. Hi Sven,
    Please give me your email address for some questions of the walther LG400 16J

  4. Hi Sven
    Is it possible to get a pressure gauge/quickfill kit for a steyr 110 so I can fit it. Did not want to send the air tube away as it has painted graphics that match the stock.

    • Hi Trevor,
      Have you seen my reply to your question on the Walther LG300 conversion page?
      As far as I know the only DIY option is one where you loose the gauge.
      Cheers, Sven.

  5. Hi Sven,

    Could you, please, send me your email address?
    I have a question or two regarding LG400 16J conversion.

    Could you, by any chance, send me blueprints for the regulator checker for the LG400 regulator?

    Thank you very much!

    Best regards,

  6. hello Sven I would turn my lg 300 7.5J to 16j …
    I would ask you kindly I have to change:

    Pressure moderator 16j to be calibrated at 85 bars ????

    spring Compression 16j

    Gasket seal

    Striker 16j

    Spring Striker 16j

    looking at the drawing or exploded drawing:

    17 Striker 16j

    35 Spring Striker Compression 16j

    73 gasket Seal

    85 Spring Compression of pressure moderator

    51 Pressure moderator 16j

    I have a barrel 42mm… 49mm is needed ?? Because???
    And to change the Striker and his spring is needed ??? why? ??

    I thank you for the answer, and if you will give me your email address x keen coN font. . with you

    • Hello Dino,

      To change a Walther LG300 from 7.5 Joule to 16 Joule all you need is an 16 Joule pressure regulator.
      Drawing no.51 part no.2693038 “Druckminderer kpl. 16J/Pressure Moderator, complete”. To order see: .
      And you have to set it at 82 to 85 bar if you want 16 joule/240 m/s with 8.4grain, or higher velocities. The 16J regulators I ordered lately where all factory set at 72 to 75 bar. This will not get you the full 16 Joule, but it will give you about 15 joule. The LG300 will shoot good with 75 bar at 233 m/s or 15 joule, there is no real need to go higher. Maybe the wind effect is a bit more, but I never noticed.

      I advise to change the valve seal as well. It is not essential to get 16 Joule but functions better. Most LG300’s have a blue or green valve seal which is quite soft. The valve seal for the LG300 Dominator (Drawing no.73 part no.2732505 Ventildichtung/Gasket Seal) is white, much harder and made from Teflon/PTFE. The PTFE seal will live longer and will lower the velocity change when temperatures change.

      You do NOT need the 16J Striker, NOT the Striker spring 16j, NOT the Spring of pressure moderator.
      And you do NOT need a longer barrel. 420mm is more than enough for 16 Joule. All Airarms S400 and S500 rifles have 425mm barrels for example. All my LG300 and LG400 Walthers have the original 420mm barrel.

      I also would advise to check the valve (Drawing 72 part 2620847 Ventil/Valve). The best type and the newest type is the flat sided one. The older ones have a conical (angled) sealing side and cause temperature shift and velocity spread.

      I hope this is all clear, when not then do not hesitate to ask again.
      Best regards, Sven.

  7. Hi,
    Did yoo succeed in the Anschutz 2002ca conversion to 16 joules?
    Kind regards,

    • Hi Ruben,
      The Anschutz 2002CA has reached the 16 Joule limit, much more work involved than a Walther, but 12 fpe/16 Joule is there and the velocity is very constant (2 m/s variation). I have been quite busy lately and could not find the time to write an article. And I have only shot the 16 Joule Anschütz 2002CA 1 time at 50 meters which is not enough to comment on the success of the conversion. And those 50m results where not what I like to see accuracy wise. 5 shot groups of about 3 cm. I tried 4 different batches of JSB pellets, but none of them grouped smaller than 30mm. But as I said, it’s been only one test. Need to clean the barrel (this rifle probably has shot many thousands of 7.5 Joule match pellets without a proper cleaning by the previous owner) and try again. And I would like an regulator tester to see how far up I have adjusted the regulator.
      The plan is to write it all down here, but it takes time.

      But thank you for the interest, and Cheers, Sven

      • Thank you for answering Sven
        I would appreciate it if you could tell me or send me some pictures of what you did to the 2002ca whenever you have time, ivruben at (no spaces)


      • Hallo Sven,

        Met veel interesse je blog gelezen over de Anschutz 2002 conversie.
        Ben zelf in heb bezit van een 2002 en wil deze aanpassen naar 16j.
        Van het blok had je een CAD tekening gemaakt in mis allen de verdere info om de aanpassingen te kunne doen zoals afmetingen van de veergeleider en type veer lijkt balpen?
        Ook zie ik een aanpassing in de valve zitting.
        Kan Ik verdere info van je krijgen?

        Vriendelijke groet André

      • Hoi André,
        Ik heb je een email gestuurd met info.
        Met vriendelijke groeten, Sven.

  8. Hi Sven.
    Do you have some tests with Anschutz convertion to 16j?
    What about zero shift? Do you have speed changes in cold or hot weather?
    I`m thinking about 9015 but this zero shift scare me :).
    So can you give me some more information about it?

    • Hello Rumen,
      I’m still working on the Anschutz 2002CA. It is currently at 16 Joule. A month ago I shot 2 great groups at 50 meter. They were 2 five shot groups that measured 15 and 20 mm. Shot outdoors from the sitting FT position. I put the rifle down to stretch my back and after 5 minutes I shot 4 more groups, but none of these were good, 30mm or larger. This made me suspect that there was something wrong with the bedding and that laying the rifle down had shifted something in the bedding. Originally the 2002 is bedded with one bottom screw in the barrelblock and the front of the barrel is fixed in the front holder. I free floated the barrel to prevent POI shift by warping of the wooden stock. So now the whole system is only hanging on to this one bedding point which is shaped like a cone. This seemed a bit unstable.
      To test the bedding I put an aluminium shim under the barrelblock to give the block more stability and this improved the results. I then bought some Devcon Plastic Steel. A 2-component epoxy that is used a lot for bedding full bore rifles. I took the ally shim out, and bedded the barrelblock in the Devcon. It sits like poured in concrete now. I tried to test this new bedding last week but unfortunately it was very windy. No conclusive results from that sessions, although the rifle felt very predictable which is a good sign.

      The Anschutz 8002/9003 and also the 9015 use a completely different bedding setup. I heard that the 9003 in the Precise stock has no zero shift issues. As the 9015 is bedded the same I suspect no problems there. I don’t know about the wooden stocks or the 9015One stock. But the 8002 Black Air is used for a few years in the UK HFT scene now, and heard no problems there. I think zero shift with the new Anschutz airrifles is something that is not present, or can easily be cured. Check for more info on the Black Air.

  9. Hi Sven
    I have greatly enjoyed reading your blog, about the work you have done to Walther, Anschutz and Feinwerkbau rifles.

    Now I think its time to turn your attention to improving the Hammerli AR20FT!


    • Hi Walter,
      Thanks for the compliments on my blog, great to see that you enjoyed it.
      The Hammerli AR20 is made by the Umarex group of which Carl-Walther Sportwaffen is also a part. But, except for the cylinder, I see very little resemblance with the Walther LG300 or LG400. The design and production of the AR20 is aimed at low cost manufacturing
      I really like the idea behind the Hammerli AR20 to make entering the FT scene more affordable. An AR20 with a Falcon T50 will allow someone to start in FT at a reasonable price level with the gear to get up to a good competition level. And the FT scene would benefit with more shooters entering.

      The big ‘but’ in improving on the AR20 is that it is financially not very worthwhile. Buying a second hand Airarms EV2, Walther LG300, Steyr LG100 or LG110 will give much more value for money and a top class rifle that holds its value much better over time.
      Another ‘but’ is that, for as far as I can see, FT shooters are ‘gear snobs’. They love all the High End stuff and gear that goes into a FT setup. Shooters that don’t suffer this syndrome 😉 , go out to shoot Hunter FT.
      And to shoot HFT there are better options at the same or lower price level than an AR20 (Airarms, BSA, FX, Weihrauch, CZ, and others).

      So I think I need to disappoint you, but I’m not going work on the AR20.
      regards, Sven.

  10. fwb 500 basic suitable for conversion to 16 jules ft air rifle?

  11. Hi Sven. Really enjoyed your comment about FT and HFT. My impression is that if your pockets aren’t deep enough there is no way that you can successfully compete with all the hi tech gear being used.
    I use an FWB Sport, which shoots well enough for me, as well being the best that I can afford.

    • Thanks for your comment, Rick.
      In FT recoiling class your FWB will do fine, and in HFT recoiling class the scope need not be expensive. Here in the Netherlands HFT recoiling class is growing to be very close in number of competitors compared to HFT PCP. It’s very competitive and very affordable at the same time. Current dutch champion, and 4th at the Worlds in Kelmarsh, shoots an HW50 with an affordable Weaver or Redfield scope with max 8 times magnification. How’s that for affordable?

  12. Hi Sven , first of all thanks for the information and time dedicated to us readers. 🙂
    I am quite new to field target, till now I was in the springer phase and is time to move to the pcp’s
    I would appreciate to guide me to what rifle should I buy, I was considering getting a walther lg300 xt anatomic second hand and I found on a webpage and convert it to 16j, AR20ft is out of question , I do not like it, it feels like a toy. Ideally I would like a wooden/laminated stock
    BTW I am a lefty so some models are harder to find,

    Thanks again


    • Hi David,
      The LG300 is an excellent choice. For left hand shooters the LG400 is easier to convert to left hand loading. But when the Anatomic you found is a left-hand rifle that is one problem less to solve. The LG300 is very easy to convert to 16 joule. Just buy a new regulator. I wish you a lot of fun in FT shooting, and with a walther rifle I’m sure you will like it.
      Regards, Sven.

  13. Good day Sven…may I know in your opinion which regulator is more consistent and also material ie coil sprin or washets…many tnx in advance.BTW Im using Lane Regulators but some people say that Huma is better

    • Hello George,
      I have limited experience with other regulators than Walther, Anschutz or Audrius.
      I have one HUMA that is in my CZ200 and that one is doing fine, but I hardly use this rifle. It is very consistent in velocity. I have 2 Audrius regulators in my Airarms S400 and S400 FAC. These have been in there for more than 7 years now, and never failed.
      As I have no experience with the Robert Lane regulators I cannot advise you on that.
      As for coil or belleville washers as springs for regulators: They both can be all right. But the design has to fit with the type of spring used. Belleville washers take less space, but also have a limited ‘stroke’ ie. they compress or move only a small distance. Coil springs are larger for the same spring force but can take much more ‘stroke’.

      My guess is that the regulator design, material used for the valve seal in the regulator and high quality o-rings have more to do with a consistent and long lasting regulator than the choice of coil or washer springs.

  14. Hello Sven,

    Thanks for your great webpage!
    I have been reading it for along time.
    I am currently converting a FWB C60 to PCP

    Living in sweden our limit for free airguns are 10Joules, may get a permit for it and bring it up to 16Joules in the future

    Check this out:

  15. Hi Sven!

    I’d be interested to see more about your anti bounce hammer design. Might you be prepared to post drawings? Also do you think it is necessary to use an anti bounce hammer with a regulator?

    Many thanks for the great blog, I’ve learnt a lot!


  16. Hi Sven,
    Congratulations for your excellent blog, I have been following up on the modifications and improvements you have made to your Anschutz 2002, the fact is that I have a 9003 S2 that I would like to modify to 16 jouls for Field Target, thank you very much for the help and orientation that can give me for the modifications and who to contact to buy the regulator to send to Venezuela. best regards!!

    • Hello Kervin,
      When you want the rifle to be modified you can try Jon Harris or Simon “Tench” in the UK. They have much experience with modification of Anschütz rifles. You can find them on the forum ‘’

      When you have a lathe and a milling machine you can try yourself. The 9003 and 8002 are easier to get to 16 Joule than the more difficult to convert 2002. I have modified my own 9003 and it basically means you need more volume in the valve cavity, same as on the 2002. You need to have a stepped hole to avoid breaking into the holes where the heads of the 4 bolts are. And you need to make a new spring guide and a weaker valve spring. The drawings of the modified 2002 on here show how it can be done (the red part here: ). You can even go a bit larger on the 9003 and make the 8 mm diameter hole larger to 9mm diameter. You do not need to modify the valve or valve block like I did on the 2002. And you also do not need to reduce the diameter of the regulator like some people do (Tench). My 9003 is running 15,5 Joule at the original factory 7,5 Joule regulator pressure. Which is around 68 Bar.

      To convert the 9003 you do not need a new regulator. But if you want a spare one you can buy it from any German gunshop on the internet that is an Anschütz dealer. Buinger, Keuchen, Bauer, Triebel. They do not have the 9003 regulator ion their website but when you send them an email they can order you one.
      Or you can try ‘’ . I currently see a spare part set for 8002 and 9003 that contains a regulator. See: .

      Good luck, Sven

  17. Hi Sven,
    My name is Tomasz, i come from Poland.
    I can’t ask you directly in below thread:
    I would ask you how was end your “adventure” with Anschutz 2002.

    Thank a lot for your answer
    Tomek 🙂

  18. Hi Sven, thanks for such a great blog, it contains a lot of info that have been very usefull to me.
    But you might help me a little further???
    Do you know the size of the valve seat Pos.73 on the dominator??

    Regards Adrian

  19. Actually 29€ plus shipping lol!!
    Thanks for taking the measurements for me, you’re the MAN!!!
    I’ve already made (well a friend of mine,since I don’t have the equipment nor the knowledge) two out of delrin. No PTFE in stock at the moment.
    I will try them out over the weekend and report back to you.

    • Hi Adrian,
      No problem. I hope your Walther will shoot well.
      Delrin may be a problem though. This was tried before by others and the Delrin got deformed over time by the impact of the valve. But there is more than one quality of Delrin. So it may work better with the stuff you have.

  20. Hi Sven
    I would like to buy an LG 300 dominator HUNTER RIFLE … I WOULD LIKE TO KNOW PRECISELY what is the difference between the hunter rifle and the classical dominator ….. trigger attack …. Spring Compression… Sprig striker… … STRIKER …. Pressure regulator … …. Etc .. Thank you very much

  21. I noticed that the trigger is different …. And the barrel length is 490mm
    If you send me your e-mail address, you can post pictures of the rifle

    • Hi Dino,
      There are quite a few differences between the LG300 Dominator and the Hunter.
      The Walther LG300 Hunter has:
      – different stock (ambidextrous, light brown laminated wood, with sling swivels)
      – barrel of 56,5 cm length (most of the Dominator rifles have a 49 cm barrel, the last few made Dominator rifles also have a 56,5 cm barrel).
      – barrel has a carbon shroud (same as the 10 metre LG300)
      – barrel has a muzzle tube (with a baffle at the front so that acts like a sound moderator)
      – trigger is from the LGM-2 rifle
      – the short aluminum junior aircilinder (33,5cm , 154cm3)

      This means that the system block (except for the trigger) and the regulator are the same as used for the Dominator. The Hunter seems to be made with both 16 and 21 Joule regulators.

      I hope this helps you. I have just recently bought a Zenith (Nick Murphy) modified LG300 Dominator (49cm barrel) in a Hunter stock myself. Unfortunately this is not originally an LG300 Hunter and also the original wooden buttplate and sling swivels are lacking. I asked Judith Billharz but these parts are not available from Walther anymore.

      Best regards, Sven.

  22. Hi Sven
    But the LG 300 Dominator are On sale or are out of production

  23. Hi sven
    The N 72 valve still has the conical and non-flat tip. I saw the photo on Bilzzard’s website
    Also as you adjust the trigger on a LG 300 dominator you could send me photos thank you very much

    • Hello Dino,
      I have added the instructions to adjust the trigger on the new page “Walter Trigger Adjustment”

      I see. The LG300 firing valve (number 72 in the exploded view) is still the old type. I do not think this is the cause of the problem you describe. This conical valve can cause some temperature induced shift. But not the effect you describe where the velocity drops off when the pressure goes below 120 bar. This must be a regulator problem. Can be your regulator is set at a wrong (probably too high) pressure. You can send me the regulator so I can check it for you.
      Regards, Sven

  24. In another article you talked about the flat N 72 valve …. Where can I buy it?
    Anyway I checked my regulator in fact it had a pressure too high 95bar

  25. Hi Sven
    But looking at the picture always has the tip conical ??

    • Hi Dino,
      No, not in the picture on the website of Schiesssport Billharz. In that picture the valve is flat on the sealing side. The older type is conical on the sealing side.
      The side where the spring sits always has a chamfered edge.
      Regards, Sven.

  26. Ok.. Grazie mille e scusami Sven x l’ignoranza tecnica

  27. Hi Sven
    Explain how you could solve the problem of changing the point of impact when the temperature changes

    • Hi Dino,
      There are a few things to do to prevent temperature shift:
      1. Clean the hammer and hammer cavity from grease / lubricant.
      2. Remove grease from the hammer spring.
      3. Use only the screw on the bottom to fix the action in the stock (do not use the 2 side screws).
      4. Make sure the barrel is free floating in the front barrel holder.
      5. Use a firing valve that has a flat sealing side.

      Regards, Sven.

  28. Hi Sven, enig idee hoe je een feinwerkbau 800x kan ombouwen voor field target er is een speciale versie van feinwerkbau maar die heb ikniet 🙂

    • Hello Kordaat,
      Omdat deze site voor het merendeel bezocht wordt door buitenlandse bezoekers ga ik in het engels antwoorden.

      To convert a Feinwerkbau 800X from 7.5 to 16 joule you need to increase the volume of regulated air available for the shot. That means a larger chamber to hold the air.
      I have checked the Feinwerkbau website [ ] but I can not find a parts list or parts drawing for the 800X Field Target version. That is a shame because that makes it more difficult to order the parts needed to convert your 800X. My best guess is you would need the FT pressure regulator, a new FT pre-chamber maybe and new screws to mount it. Jon Harris in the UK has a lot of experience converting the 800X, and in his opinion just swapping the regulator will bring you to 16 joule, but it will not necessarily make you a good shooting rifle. There a more things that need to be changed to make a good shooting FT rifle out of an 800X. Read this page for instance:

      If you are really looking for a good shooting 16 joule Feinwerkbau 800X I suggest you send you rifle to Jon Harris and let him do his magic. Because according to Jon and others the factory 800X Field Target is not 100% suited for the job.

  29. Hi Sven. Thanks very much for all your efforts and the fact that You are willing to share what You have learnt. Because of your site I am now converting my LG400 to a 16 joule model. I bought the 16j reg and the aadaptor seal. But I got a leak because I did not put an o-ring on top of the Teflon adaptor. I read your article again and I found the Dimensions 9.25 mm ID x 1.78 mm. But perhaps you now how much shore this o-ring has to be? Because I believe you didn’t mention it. If the regulator needs adjustment, are you willing to assist in that or do you have the contact information for the man who made all that fancy equipment you showed? Hope You have a lot of fun in clear passion for airguns. lovely!

    • Hello stpeeke,

      Sorry for the delay in answering, I was on holidays.
      The hardness for the regulator to adapter o-ring is not very critical (there are no moving parts involved, so there is no wear).
      I use 70 shore NBR and my LG400 is still on the first o-ring I put in there. I have had remarks from one user that had a leak with the 9.25×1.78 o-ring right after fitting the reg. He then used a 10×2 o-ring which worked fine. Apparently his LG400 had a little bit deeper valve hole or the reg was a bit short?
      Good luck with the conversion and good shooting,

  30. Do you have a strip guide for the LG 300 to disassemble the pellet probe and striker for cleaning please

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